CDialog from a MFC dll... - C / C++ / MFC Discussion Boards

NT I/O Port access !? Is it easy?

Behzad Ebrahimi10-Mar-03 6:29

Behzad Ebrahimi

10-Mar-03 6:29

Hi,
How can I access to I/O port in NT Windows?

Thank you for your guides, beforehand. Rose | [Rose]

Re: NT I/O Port access !? Is it easy?

Tim Smith10-Mar-03 6:40

Tim Smith

10-Mar-03 6:40

You can use WinRT http://www.pds-site.com/Bsquare/WinRT/default.htm[^].

Or you could write your own device driver.

However, user mode code isn't allowed to access i/o ports directly since that would be a security violation.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Passing Strings to and from VB via a dll

dazinith10-Mar-03 6:18

dazinith

10-Mar-03 6:18

i am so utterly frustrated right now.. i have been trying to pass a string from VB into a function, modify it and return it back to VB.. but i just cannot understand this BSTR crap.. i have tried to accomplish this 2 ways and im stuck both.. so im gunna list em both, and maybe someone will know how to fix one? thanks a bunch for any advice..

Problem number 1:
I pass 3 variables into my function..
FindBankName(strFilename, strRoutingNumber, strBankName)
when i call this function from VB i pass it these values in this order:
("C:\\FedACHdir.txt", "282976020", "bankname")
but as you will see below my c++ function does not get them in this order..
c++ function:

void __stdcall CFpsPayTaxxApp::FindBankName(BSTR strFilename, BSTR strRoutingNumber, BSTR strBankName)
{
	CString strTemp;
	strTemp = "The Filename passed is: >" + (CString) (LPCTSTR)strFilename + "<";
	AfxMessageBox(strTemp);
	
	strTemp = "The RoutingNumber passed is: >" + (CString)(LPCTSTR)strRoutingNumber + "<";
	AfxMessageBox(strTemp);

	strTemp = "The BankName passed is: >" + (CString)(LPCTSTR)strBankName + "<";
	AfxMessageBox(strTemp);
}

what i get for output is 3 message boxes.. the first says ">282976020<", the second ">bankname<", and the third has funky characters.. so the first parameter is never seen.. i have tried passing by reference, not by reference, passing with a return value, without a return value, passing as char* instead of BSTR, but i never get the first parameter.. the other problem with this approach is that i crash when i modify the passed in BSTR's..

Problem number 2:
I tried to take an ATL dll that is on CP which has examples involving BSTR's.. i got that dll to work fine with the parameters being passed.. the function even modified the string and returned it as modified (which i cant seem to do in the first method at all without crashing).. the problem here is that i can't seem to modify the string and return it.. probably because i am not handling the BSTR's properly.. but at least the example works, its just way to cryptic for me.. here is what i have trying to just return the variable modified.. it doesn't work either..

void __stdcall GetBankName(BSTR strFilename, BSTR strRoutingNumber, BSTR strBankName, BSTR strErrResponce)
{
strBankName = "what the?";
}

this doesnt change the text.. and the example i have i cant even follow..http://www.codeproject.com/dll/superdll.asp[^]

Conclusion:
problem #1 working would be alot better for me because i could use CStrings and other MFC things, where as problem #2 uses ATL and I am so lost dealing with these BSTR strings.. all I need to do is be able to set a char* array to a BSTR.. but i just cant seem to follow it..

if you have any idea what im doing wrong in #1, or can offer some suggestions on understanding modifying BSTR's in problem #2 i would be very appreciative.. thanks Confused | :confused:

still a newb.. cut me some slack :P
-dz

Re: Passing Strings to and from VB via a dll

AlexO10-Mar-03 6:29

AlexO

10-Mar-03 6:29

"(CString) (LPCTSTR)strFilename " is very bad idea.
try
a)
#include "comdef.h"
CString str = _bstr_t(strFilename);

b.)
CString str = OLE2T(strFilename);

Re: Passing Strings to and from VB via a dll

dazinith10-Mar-03 7:27

dazinith

10-Mar-03 7:27

ill keep that in mind.. how would i turn it back to a CString, or better yet how would i turn a BSTR to a char* and then back to a BSTR?

still a newb.. cut me some slack :P
-dz

Re: Passing Strings to and from VB via a dll

Brian Shifrin10-Mar-03 8:58

Brian Shifrin

10-Mar-03 8:58

void functionF(BSTR bstr)
{
CComBSTR cBstr = bstr;
CString str(bstr);
CString strAppend;

strAppent = str + CString(bstr); //Appending Strings
strAppend += str;

//Similiar with CComBSTR and _bstr_t

}

Re: Passing Strings to and from VB via a dll

dazinith10-Mar-03 7:51

dazinith

10-Mar-03 7:51

hrm.. seems the whole problem is that i was listing the classname in front of the function like:
void __stdcall CFpsPayTaxxApp::FindBankName(BSTR strFilename, BSTR strRoutingNumber, BSTR strBankName)
i took off the classname in front of the function and it now the vars come in fine..
void __stdcall FindBankName(LPSTR strFilename, LPSTR strRoutingNumber, LPSTR strBankName)

wierd stuff.

still a newb.. cut me some slack :P
-dz

CDialog from a MFC dll...

RobJones10-Mar-03 6:09

RobJones

10-Mar-03 6:09

Hello,
I have never tried to load a dialog box from a dll.. I have created a Static MFC DLL and created a dialog within the dll.. I used this to export the class hoping that this would allow me to use the dialog..

class AFX_EXT_CLASS CSettingsDlg : public CDialog
{
public:
	CSettingsDlg();
	~CSettingsDlg();

// Dialog Data
	//{{AFX_DATA(CSettingsDlg)
	enum { IDD = IDD_SETTINGS }; <------HERE
	//}}AFX_DATA

..... BLAH BLAH

The problem is when I add the .lib, .h and dll to the other application and try to compile it I get an error on this line..

enum { IDD = IDD_SETTINGS }; <--

Any ideas?

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Re: CDialog from a MFC dll...

Bill Gates Antimatter Particle10-Mar-03 6:35

Bill Gates Antimatter Particle

10-Mar-03 6:35

You need to set the resource handle to the dll the switch it back again;
you should see a line of code like this somewhere in your dll, probably near DllMain function:

static AFX_EXTENSION_MODULE MyDLL = { NULL, NULL };

define a
HMODULE MyModuleHandle;
globally;

in DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
...
new CDynLinkLibrary(MyDLL);
//Add this line
MyModuleHandle = MyDLL.hModule;
}

then before you create your dialog, do something like this:

HINSTANCE pPreviousInstance = AfxGetResourceHandle();
AfxSetResourceHandle(MyModuleHandle);
m_pMyDialog = new CMyDialog();
...
AfxSetResourceHandle(pPreviousInstance);

this should solve that problem..
Big Grin | :-D

"Life begins at 140"

Re: CDialog from a MFC dll...

Alvaro Mendez10-Mar-03 7:36

Alvaro Mendez

10-Mar-03 7:36

Try adding:

#include "resource.h"

to the top of the header file (SettingsDlg.h).

Regards,
Alvaro

Quitters never win. Winners never quit. But those who never win and never quit are idiots. -- despair.com

Change menu name on run-time

whofmans10-Mar-03 5:55

whofmans

10-Mar-03 5:55

Hello!

How can i change a menu name on runtime. With the menu-name i mean by example "File", "Edit" or "Help". Submenu's is not a problem for me because they have a ResourceID, but the menu's that i want to change on runtime does not have that, or i can't find them?

Thanks for helping me.

Re: Change menu name on run-time

RobJones10-Mar-03 6:16

RobJones

10-Mar-03 6:16

I haven't tried this but it should work.. where 0 is the first item on the menu like "File".

CMenu *pMenu = GetMenu();
CString csMnuStr;
pMenu->GetMenuString(0, csMnuStr, MF_BYPOSITION);
pMenu->ModifyMenu(0, MF_BYPOSITION, 0, "New Text");
DrawMenuBar();

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Thanks! I have used it for language translation

whofmans10-Mar-03 23:47

whofmans

10-Mar-03 23:47

Thanks!

Now automaticly all the menu-item texts goes through a translate function. So that my program works with different language's.

<br />
	// TRANSLATE THE MENUS!<br />
	CMenu *pMenu = GetMenu();<br />
	CMenu *pSubMenu;<br />
	CMenu *pSubSubMenu;<br />
<br />
	CString csMnuStr;<br />
	<br />
	for(int i=0; pMenu->GetMenuState(i, MF_BYPOSITION) != -1; i++) // MENU<br />
	{<br />
		if(pMenu->GetMenuString(i, csMnuStr, MF_BYPOSITION) < 1) // empty string<br />
			continue;<br />
<br />
		pMenu->ModifyMenu(i, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
		<br />
		pSubMenu = pMenu->GetSubMenu(i);	// Get menu items<br />
		<br />
		if(pSubMenu == NULL)	// Submenu does not exist<br />
			continue;<br />
		<br />
		for(int j=0; pSubMenu->GetMenuState(j, MF_BYPOSITION) != -1; j++) // SUBMENU<br />
		{<br />
			if(pSubMenu->GetMenuString(j, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
				continue;<br />
<br />
			pSubMenu->ModifyMenu(j, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
<br />
			pSubSubMenu = pSubMenu->GetSubMenu(j);	// get sub menu items<br />
			<br />
			if(pSubSubMenu == NULL)	// SubSubMenu does not exist<br />
				continue;<br />
			<br />
			for(int k=0; pSubSubMenu->GetMenuState(k, MF_BYPOSITION) != -1; k++) // SUB-SUBMENU<br />
			{<br />
				if(pSubSubMenu->GetMenuString(k, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
					continue;<br />
<br />
				pSubSubMenu->ModifyMenu(k, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
			}		<br />
		}<br />
	}<br />
	DrawMenuBar();<br />

Thanks! I have used it for language translation

whofmans10-Mar-03 23:51

whofmans

10-Mar-03 23:51

Thanks!

Now automaticly all the menu-item texts goes through a translate function. So that my program works with different language's.

<br />
	// TRANSLATE THE MENUS!<br />
	CMenu *pMenu = GetMenu();<br />
	CMenu *pSubMenu;<br />
	CMenu *pSubSubMenu;<br />
<br />
	CString csMnuStr;<br />
	<br />
	for(int i=0; pMenu->GetMenuState(i, MF_BYPOSITION) != -1; i++) // MENU<br />
	{<br />
		if(pMenu->GetMenuString(i, csMnuStr, MF_BYPOSITION) < 1) // empty string<br />
			continue;<br />
<br />
		pMenu->ModifyMenu(i, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
		<br />
		pSubMenu = pMenu->GetSubMenu(i);	// Get menu items<br />
		<br />
		if(pSubMenu == NULL)	// Submenu does not exist<br />
			continue;<br />
		<br />
		for(int j=0; pSubMenu->GetMenuState(j, MF_BYPOSITION) != -1; j++) // SUBMENU<br />
		{<br />
			if(pSubMenu->GetMenuString(j, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
				continue;<br />
<br />
			pSubMenu->ModifyMenu(j, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
<br />
			pSubSubMenu = pSubMenu->GetSubMenu(j);	// get sub menu items<br />
			<br />
			if(pSubSubMenu == NULL)	// SubSubMenu does not exist<br />
				continue;<br />
			<br />
			for(int k=0; pSubSubMenu->GetMenuState(k, MF_BYPOSITION) != -1; k++) // SUB-SUBMENU<br />
			{<br />
				if(pSubSubMenu->GetMenuString(k, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
					continue;<br />
<br />
				pSubSubMenu->ModifyMenu(k, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
			}		<br />
		}<br />
	}<br />
	DrawMenuBar();<br />

Thanks! I have used it for language translation

whofmans10-Mar-03 23:56

whofmans

10-Mar-03 23:56

Thanks!

Now automaticly all the menu-item texts goes through a translate function. So that my program works with different language's.

<br />
	// TRANSLATE THE MENUS!<br />
	CMenu *pMenu = GetMenu();<br />
	CMenu *pSubMenu;<br />
	CMenu *pSubSubMenu;<br />
<br />
	CString csMnuStr;<br />
	<br />
	for(int i=0; pMenu->GetMenuState(i, MF_BYPOSITION) != -1; i++) // MENU<br />
	{<br />
		if(pMenu->GetMenuString(i, csMnuStr, MF_BYPOSITION) < 1) // empty string<br />
			continue;<br />
<br />
		pMenu->ModifyMenu(i, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
		<br />
		pSubMenu = pMenu->GetSubMenu(i);	// Get menu items<br />
		<br />
		if(pSubMenu == NULL)	// Submenu does not exist<br />
			continue;<br />
		<br />
		for(int j=0; pSubMenu->GetMenuState(j, MF_BYPOSITION) != -1; j++) // SUBMENU<br />
		{<br />
			if(pSubMenu->GetMenuString(j, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
				continue;<br />
<br />
			pSubMenu->ModifyMenu(j, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
<br />
			pSubSubMenu = pSubMenu->GetSubMenu(j);	// get sub menu items<br />
			<br />
			if(pSubSubMenu == NULL)	// SubSubMenu does not exist<br />
				continue;<br />
			<br />
			for(int k=0; pSubSubMenu->GetMenuState(k, MF_BYPOSITION) != -1; k++) // SUB-SUBMENU<br />
			{<br />
				if(pSubSubMenu->GetMenuString(k, csMnuStr, MF_BYPOSITION) < 1)	// empty string<br />
					continue;<br />
<br />
				pSubSubMenu->ModifyMenu(k, MF_BYPOSITION, 0, theApp.translate(csMnuStr));<br />
			}		<br />
		}<br />
	}<br />
	DrawMenuBar();<br />

Willem

Re: Change menu name on run-time

Renjith Ramachandran10-Mar-03 7:49

Renjith Ramachandran

10-Mar-03 7:49

try DrawMenuBar()

CodeTheDreams();

new comer

Mr. Andrea10-Mar-03 5:16

Mr. Andrea

10-Mar-03 5:16

Within a few days I'll begin to submit my arguments.

Re: new comer

Maximilien10-Mar-03 5:29

Maximilien

10-Mar-03 5:29

Mr. Andrea wrote:
Within a few days I'll begin to submit my arguments.

Confused | :confused:

On what subject ?

Maximilien Lincourt
For success one must aquire one's self

Re: new comer

Alvaro Mendez10-Mar-03 7:37

Alvaro Mendez

10-Mar-03 7:37

Why?

Quitters never win. Winners never quit. But those who never win and never quit are idiots. -- despair.com

save increment filenames...

macmac3810-Mar-03 5:10

macmac38

10-Mar-03 5:10

Hi,

i like to save received data files (.pmj) from a scanner serially numbered on my disc (001.pmj, 002.pmj, ...) I know i must work with a loop and a variable, but it is too tricky for me.

Untill now i do the following:

// Save the file...
if (r)
{

CString fileName = "e:\\data\\001.pmj";
SavePMJStream(fileName);
}

Thanks for help, Mark

Re: save increment filenames...

Maximilien10-Mar-03 5:24

Maximilien

10-Mar-03 5:24

use a int variable to hold the counter ( file number )
use CString::Format to format the counter into a string.

use the for loop to increment the counter and format filename as a string, and pass it to the SavePMJStream .

Max.

Maximilien Lincourt
For success one must aquire one's self

Re: save increment filenames...

Renjith Ramachandran10-Mar-03 7:54

Renjith Ramachandran

10-Mar-03 7:54

macmac38 wrote:
Untill now i do the following:

// Save the file...
if (r)
{

CString fileName = "e:\\data\\001.pmj";
SavePMJStream(fileName);
}

----------------------------
CString csPath, csFileName;
int nLastFile;//Keep SomeWhere (Registry/file)

csPath = "e:\\Data\\";

if (r)
{
csFileName.Format("%03d", ++nLastFile);
csPath +=csFileName;
SavePMJStream(csPath);

}

Why Not THIS.?????

CodeTheDreams();

Adding icons to an imagelist that is used in a listctrl

Jochem10-Mar-03 5:01

Jochem

10-Mar-03 5:01

I use a CListCtrl on a dialog. The problem is that the background of the icons is somehow changed to black when the dialog pops up. But the background is supposed to be transparent.

Who knows how to prevent this?

This is the code that i use:

CMyDlg::OnInitDialog()<br />
{<br />
   m_imageList.Create(32, 32, ILC_COLOR4, 2, 2);<br />
<br />
//adding the icons<br />
   for(int i=0; i<2; i++)<br />
   {<br />
      int nID = GetIconID( i );<br />
<br />
      //code taken from CWinApp::LoadIcon(int nID )<br />
      HICON hIcon = ::LoadIcon(AfxFindResourceHandle(MAKEINTRESOURCE(nID),<br />
                                RT_GROUP_ICON), MAKEINTRESOURCE(nID));<br />
<br />
      m_imageList.Add(hIcon);<br />
   }<br />
<br />
   m_listCtrl.SetImageList(&m_imageList, LVSIL_NORMAL);<br />
<br />
//inserting items in the listctrl<br />
   for(int nIndex=0; nIndex<2; nIndex++)<br />
   {<br />
      m_type.InsertItem(nIndex, "some text", nIndex);<br />
<br />
      nIndex++;<br />
   }<br />
}

Thanks in advance,

Jochem

Re: Adding icons to an imagelist that is used in a listctrl

RobJones10-Mar-03 6:27

RobJones

10-Mar-03 6:27

not sure but it could be this
Jochem wrote:
m_imageList.Create(32, 32, ILC_COLOR4, 2, 2);

try using ILC_COLOR16|ILC_MASK instead of ILC_COLOR4

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

Re: Adding icons to an imagelist that is used in a listctrl

Jochem11-Mar-03 1:15

Jochem

11-Mar-03 1:15

Adding ILC_MASK did the trick

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