What's up? My hook works but my program doesn't work - C / C++ / MFC Discussion Boards

hi yes i want all the info regarding the screen including the associated menus.
the problem is getting a handle to the individual menus.when i tried using GetMenu with the topmost window the return value is NULL.the problem is compounded by the fact that the structure MENUBARINFO is not recognised by my program.any pointers??
thanks

subir talukder

What is it you want?! Confused | :confused:

The screen capture! OR the CMenu return!?
Be exact please. Smile | :)

hi its the CMenu or rather the HMENU values that i want since i am using Platform SDK.

subir

for the SDK, use GetMenu() directly.
for the MFC, use a CMenu object and then the GetMenu() of that object.

Hello,
I guess the subject says most of what this is. I was using Delphi 5 and liked many of the components that have been made for it. I am wondering if there is any software or any way to convert Borland C+ Builder components or VCL to Visual Basic 6 or Visual Studio 6.

The main reason really is because I like the Coolform component which allows you to use an image like a skin almost. I have tried a couple skin type programs but I'm new to MVS and couldn't figure them out so this is why I am asking.

Any other help would be apreciated if you have a link or something.

Thanks

Chris Bunting

I have never seen any...

Everything is possible, but it's not easy to port Delphi Components to VC.

The Pascal to C++ process is not so bad, I have done it a couple of times Smile | :)

But Delphi uses VCL (Visual Component Library), and to easily port the components, you almost need to make a C++ VCL, not an easy task...

You can't use C++ Builder Components either, because they are also written in Pascal...

Good Luck, if you find a "Delphi Components to C++" anywhere, please let me know...

- Anders

You can't make them native components, but you could wrap the BCB component in an ActiveX wrapper. This would allow you to use the control in VB or VC. You would have to use Delphi's ActiveX tools though.

Hello. It's the first time i've made a program about hooks. So The program is very simple. I use a DLL. The keys pressed buy the user will be saved in a small Buffer till the user press ESC. Then the program should show the Buffer and stop.

Here is the DLL
_______________

#include <windows.h>
#include "Definiciones.h"

#pragma data_seg(".DATOS_COMPARTIDOS_DE_LA_DLL")
HHOOK hHookDLL = NULL;//

#pragma data_seg()

char Buffer[100] ="";
BOOL Bandera = FALSE;

BOOL WINAPI DllMain (HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpReserved)
{

switch(fdwReason)

{

case DLL_PROCESS_ATTACH:

if (lpReserved)
{

if ( hHookDLL ) // Si ya se consigió el handle, salir
return FALSE;

hHookDLL = SetWindowsHookEx( WH_KEYBOARD, (HOOKPROC)KeyboardProc, hInstDLL, GetWindowThreadProcessId(GetActiveWindow(),NULL));
}

return TRUE;

case DLL_THREAD_ATTACH:

return TRUE;

case DLL_THREAD_DETACH:

return TRUE;

case DLL_PROCESS_DETACH:

if ( hHookDLL )
{
UnhookWindowsHookEx( hHookDLL );
hHookDLL = NULL;

}

}

return TRUE;

}

LRESULT CALLBACK KeyboardProc(
int idHook, // hook code
WPARAM wParam, // virtual-key code
LPARAM lParam // keystroke-message information
)
{

if (idHook < 0)
{
return (CallNextHookEx(hHookDLL, idHook, wParam, lParam));
}

else
{

LRESULT r =CallNextHookEx(hHookDLL, idHook, wParam, lParam);

if ((wParam >= 48) && (GetKeyState(wParam) &0xF0))//
{
Bandera = TRUE;
if (strlen(Buffer) < 100)
{

Buffer[strlen(Buffer)]= (char) wParam;
Buffer[strlen(Buffer)+1] = 0;
}
}

if (wParam == VK_ESCAPE)
{
Bandera = TRUE;//<-----------THE PROGRAM SEEMS NOT TO
//<----------- CHECK THE NEW STATE
MessageBox(NULL,Buffer,"Pressed ESC",MB_OK);

}

return(r);
}
}

int RetornaBandera(void)//returns true or false that's all
{
return Bandera;
}

Here is the program which loads statically the DLL
__________________________________________________

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
while(!RetornaBandera())//An exported function from the DLL which SHOULD
//return ESC was pressed

return 0;
}

Raúl

Hello!
Now I'm working under some multimedia system and need to play one video file in several windows simultaneously. I tried to use MCI devices for realize it, but have some problems: I can't open MCI device as shareable, i.e. another attempt of opening second MCI device using the same file return error MCIERR_UNSUPPORTED_FUNCTION.
Can anybody explain to me where am I wrong?

Thanks in advance,
Yuri Spivak
Software Developer, Russia

Hello,
I am trying to create a com component in vc++ ATL using the import directive to create the conneciton and recordset objects.
After successfully creating and opening the connection and recordset. The recordset returns the recordcount != 0. There is a function in recordset which returns the whole recordset as string. It gives an exception which i am able to catch with "catch (...)" kind of catch block.
Can anyone specify what could be the problem as well as the solution for this kind of a problem.
OS-win98. database sql-7.0 vc++-6.0 atl-3.0 ado-1.5

Thanks in Advance
Regards
Alpesh Makwana

How change volume of sound and cursor in system (9x)

It is necessary to create CListCtrl so that the user could not change the size of columns. Flag LVS_NOCOLUMNHEADER cannot be used. Columns should have header.
Help me.

Hi!

Try to handle WM_SETCURSOR, HDN_BEGINTRACKA/HDN_BEGINTRACKW and HDN_DIVIDERDBLCLICKA/HDN_DIVIDERDBLCLICKW messages:

BEGIN_MESSAGE_MAP(CMyHeaderCtrl, CHeaderCtrl)
...
ON_WM_SETCURSOR()
ON_NOTIFY_REFLECT_EX(HDN_BEGINTRACKA, OnBeginTrack)
ON_NOTIFY_REFLECT_EX(HDN_BEGINTRACKW, OnBeginTrack)
ON_NOTIFY_REFLECT_EX(HDN_DIVIDERDBLCLICKA, OnDividerDblClick)
ON_NOTIFY_REFLECT_EX(HDN_DIVIDERDBLCLICKW, OnDividerDblClick)
END_MESSAGE_MAP()

BOOL CMyHeaderCtrl::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
DWORD dwPos = ::GetMessagePos();

HDHITTESTINFO hdhti;
hdhti.pt.x = LOWORD( dwPos );
hdhti.pt.y = HIWORD( dwPos );

ScreenToClient( &hdhti.pt );
DefWindowProc( HDM_HITTEST, 0, ( LPARAM )&hdhti );

if ( !IsResizableColumn( hdhti.iItem ) && ( hdhti.flags & HHT_ONDIVIDER ) )
{
return true;
}

// Do default processing
return CHeaderCtrl::OnSetCursor(pWnd, nHitTest, message);
}

BOOL CMyHeaderCtrl::OnDividerDblClick(NMHDR* pNMHDR, LRESULT* pResult)
{
HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;

if ( !IsResizableColumn( phdn->iItem ) )
{
*pResult = 0;
return true;
}

// Do default processing
return false;
}

BOOL CMyHeaderCtrl::OnBeginTrack(NMHDR* pNMHDR, LRESULT* pResult)
{
HD_NOTIFY *phdn = (HD_NOTIFY *) pNMHDR;

if ( !IsResizableColumn( phdn->iItem ) )
{
*pResult = 1;
return true;
}

// Do default processing
return false;
}

Regards,
Nikolay Denisov

Hi
This Doc/View architecture is still giving me a headache. I'm using the Kodak Imaging Controls Admin, Thumbnail and Edit. I have a SDI with three panes. One shows the thumbnail control, the other shows the edit control, the other live video and the admin control resides in CMainFrame. Except I'm certain this isn't an efficient way of doing things because I end up with code like in CMainFrame:

CDocument * pDoc = GetActiveDocument();
POSITION pos = pDoc->GetFirstViewPosition();

while (pos)
{
CView * pView = pDoc->GetNextView(pos);
if (pView->IsKindOf(RUNTIME_CLASS(CEditView)))
((CEditView*) pView)->SetImage(strFullPathName);
if (pView->IsKindOf(RUNTIME_CLASS(CThumbView)))
((CThumbView*) pView)->SetImage(strFullPathName);
}

It seems I have two choices.

1/ Derive my ThumbView & CEditView class from some base class (eg. ImageView) and have virtual functions for eg. SetImage. But wouldn't this still require calling IsKindOf because I would only want to call ImageView and not say MovieView which I also have?

2/ Or do I put all the controls in the Document class and my views can just access them when needed? However because the thumbCtl is only concerned with displaying images, this seems incorrect

Of course there's the 3rd possibility that I've got everything wrong Frown | :(

Any advice is greatly appreciated.

Regards

Brendan

There are lots of solutions to this problem actually.

The most efficient is probably to derive your classes from a common CImageView class. Then you can override these functions in the actual view class to do what you want.

Now, instead of using the Doc/Vew mechanism for calling functions, which is inherantly error prone, you can instead create a publish/subscribe handler, also called Observer Pattern.

In your CDocument derived class, you create and instance of an Observer class. This is a class which simply takes a pointer to some other kind of class (CImageView in this case) and stores it in a list. Then, when you go to update, you need only get each item in the list (and since they're already stored as CImageView pointers, you need only do this pListItem->SetImage(...).

This avoids all the issues your dealing with by calling the functions directly, and then only for the objects which are actually CImageView's.

example (off the top of my head, so it may not compile):

#include <list>
class CImageViewObserver {
    std::list<CImageView*> imageList;
public:
    AddView(CImageView* pView){imageList.push_back(pView);}:
    RemoveView(CImageView* pView){imageList.remove{pView);};
    Update(CString s){/*iterate over list and call SetImage() for each one*/};
}

Then, in your CThumbView or whatever simply put a call to AddView in your OnCreate(), or OnInitialUpdate() (but be sure to clear out your Observer in OnNew() to make sure you don't leave anything hanging around):

CMyDoc *pDoc = (CMyDoc*)GetActiveDocument();
pDoc->m_ivObserver.AddView(this);

Then, wherever you update, you need only pass the image path to the Observer::Update function.

Hi,

I know there is both std::string for standard asci text, and std::wstring for unicode chars...

My problem is that I want to write code that compiles both with and without unicode defined. With chars I just use TCHAR, and the preprocessor makes the work for me, is the anything defined when using STL?

TIA.

- Anders

The following is based on Microsoft's version of STL included in MSVC 6.0 SP3.

std::string is really just the definition std::basic_string<char> and std::wstring is std::basic_string<wchar_t>. If you want a TCHAR version you will have to declare your own as I have not found support for it directly: So in a header file you can define

#include <tchar.h>
#include <string>

using std::basic_string;

basic_string<tchar> tstring;

Then use tstring where you would use string 's or wstring 's. TCHAR will be preprocessed into the proper version for you.

Of course, you can apply this to all the character based STL using the 'basic_*' template definitions.
For example:
A build specific version of cout could be:

basic_ostream<tchar> tout;

It is up to you if you want to add these to the std namespace or your own. But it would not take much to create a header file that defines all character related stl classes in this manner. However, there are some interface functions that do not use the char_traits<> template (such as basic_ifstream::open which takes a const char * for the name of the file to open) so just be aware of these.

Good luck,

Chad

The original post seemed to eat my < > chars:

The following is based on Microsoft's version of STL included in MSVC 6.0 SP3.

std::string is really just the definition std::basic_string< char > and std::wstring is std::basic_string< wchar_t >.

If you want a TCHAR version you will have to declare your own as I have not found support for it directly:

So in a header file you can define
#include < tchar.h >
#include < string >

using std::basic_string;

basic_string< TCHAR > tstring;

Then use tstring where you would use string 's or wstring 's. TCHAR will be preprocessed into the proper version for you.

Of course, you can apply this to all the character based STL using the 'basic_*' template definitions. For example: A build specific version of cout could be:

basic_ostream< TCHAR > tout;

It is up to you if you want to add these to the std namespace or your own. But it would not take much to create a header file that defines all character related stl classes in this manner. However, there are some interface functions that do not use the char_traits<> template (such as basic_ifstream::open which takes a const char * for the name of the file to open) so just be aware of these.

Good luck,
Chad

Thanks a lot, I'll do it my self...

I just thought that, maybe, MS had done it for us...

- Anders

I am looking for a way to force my MFC program to
look at the message queue, like the Visual Basic
DoEvents() function. Like this:

while(some_bool)
{
callFunc();
Force_To_Look_At_Message_Queue_Func();
}

Does anyone have any good ideas?
Thanks!

I have the following static function in my class. (I also have a non-static function that takes no arguments and simply calls HandleMessages(m_hWnd, true). The reason I gave it the option to not do Idle processing is that OnIdle will kill the table that maps your CWnd's to HWND's. That is, if you have a temporary CWnd*, it will be useless after Idle processing happens. Anyway, all the function does is mimic what your program does while it's sitting around doing nothing. (The declaration is private: static void HandleMessages(HWND hWnd, bool bIdle = true))

void CypherusDlg::HandleMessages(HWND hWnd, bool bIdle /*=true*/)		//static
{
    MSG msg;
    while (::PeekMessage(&msg, hWnd, 0, 0, PM_NOREMOVE)) 
    { 
		if (!AfxGetApp()->PumpMessage()) 
		{ 
			break; 
		}
	}

	if(bIdle)
	{
		// let MFC do its idle processing
		LONG lIdle = 0;
		while (AfxGetApp()->OnIdle(lIdle++))
		{
			//nothing
		}
	}
}

Hi,
We are having a problem with our MFC application which seems to be related to MFC's temporary/permanent handle map mechanism. Our application incorporates HTML Help functionality. If we bring up the HTML Help file, the application asserts when it is being closed. This does not happen in case the HTML Help file is not brought up.

We had break points in most of the Wincore.cpp functions. Our point of concern is the CHandleMap not getting the correct pointer. Following is the statement which causes the problem

CHandleMap* pMap = afxMapHWND();
ASSERT(pMap != NULL);
We debugged into afxMapHWND() to find some details. From what we have seen, member variable m_pmapHWND should not be NULL. This map contains both temporary and permanent Maps for CWnd vs HWnd for the windows created by application vs windows opened by the application.

Any pointers on why the m_pmapHWND attribute gets invalidated in case the HTML Help file is brought up would be greatly appreciated.

P.S. The call to HtmlHelp API is:
HtmlHelp(0, strFileName , HH_HELP_CONTEXT, nContextID);

Hi,

Is it possible to save an HICON(from a CImageList) into an ico file with VC++.

I've got the ico file structure, but I don't know how can I have a DIB from my HICON...

Thanks a lot, for help

Vincent

i am eager to wait your reply.

thanx Confused | :confused:

The Rogue Wave/Stingray package has a class to display GIFs, its the only one I know of.

The reason there are not many such classes is that to use GIF you have to buy an expensive license from Unisys. I looked into this once, and couldn't even find a person at Unisys who could tell me how to go about getting GIF license. I concluded that Unisys would rather sue people using GIFs than sell them a license.

Is there any reason your application can't use PNG or JPG formats? There are plenty of good classes for these formats.