Re: ModifyStyle - C / C++ / MFC Discussion Boards

SilentWarrior22-Jul-02 7:38

22-Jul-02 7:38

is there a way i could disable the menus from my code
the code in msdn(july 2002) gives me a runtime exception.
thanks

looking forward from all the gurus of code

Re: disabling menus

Shog⁹22-Jul-02 12:56

Shog⁹

22-Jul-02 12:56

*ahem*
we are projects of code here... or something like that.

Anyway, could you give a few more details? Are you using MFC, or straight Win32? Do you need to disable one menu, or all of them, or just certain ones? And what have you tried (i don't have the july MSDN here)?

For reference, the functions EnableMenuItem() and potentially DrawMenuBar() will most likely be your starting point.

Shog⁹
--

Maybe Java is kind of like God, it "works in mysterious ways". It seems like your apps are running slowly, because in the backgroud Java is solving world hunger, or finding the cure to cancer.
- Ryan Johnston, Don't die java!

Re: disabling menus

SilentWarrior23-Jul-02 7:31

SilentWarrior

23-Jul-02 7:31

i have tried using
pMenu->AppendMenu(MF_STRING | MF_DISABLED, 0, "Insert");

and
the submenu pointer code

CMenu* mmenu = GetMenu();
CMenu* submenu = mmenu->GetSubMenu(4);

if (menuID == IDM_VIEW_OBJECTONLY) {
submenu->CheckMenuItem(IDM_VIEW_OBJECTONLY, MF_CHECKED | MF_BYCOMMAND);
submenu->CheckMenuItem(IDM_VIEW_PATHOBJECT,

and some thing from msdn .. which was more simpler

but all things give me one same run time error..

looking forward from all the gurus of code

Re: disabling menus

Shog⁹23-Jul-02 8:59

Shog⁹

23-Jul-02 8:59

SilentWarrior wrote:
but all things give me one same run time error

What run time error is that?

The code looks right (though cut off); if i were to guess, i'd say maybe 4 is the wrong indice for the menu you're looking for. Step through with a debugger & see what the return values are for each stage.

Shog⁹
--

gaining access to 16-bit process space ?

bisserke22-Jul-02 7:29

bisserke

22-Jul-02 7:29

hi,

I'm trying to gain access to a 16-bit app.

i'm trying something like :

::readProcessMemory(ProcHandle, (LPVOID)OffSet, buffer, BytesToRead, &BytesRead);

this doesn't work.

I did some research and it seems that all 16-bit apps operate in the same address space.
Well, ... I found a DLL (toolhelp.dll) with which I can get the Job done but only in WIN9x.

I need something to get the job done under NT too.

preferably I'm looking for a way that works equally good in all environments.

thx & greetz

I used to have a life ... now I have a computer

Launch a new instance from SDI app ?

yarp22-Jul-02 6:15

yarp

22-Jul-02 6:15

Help,
I'm trying to launch a new IE instance from a CHtmlView based SDI application.
The code is as follows:

// Get a pointer to the application object
CWinApp* pApp = AfxGetApp();

// Get the correct document template
CDocTemplate* pDocTemplate;

POSITION pos = pApp->GetFirstDocTemplatePosition();
pDocTemplate = pApp->GetNextDocTemplate(pos);

// Create the new frame
CDocument* pDoc = pDocTemplate->CreateNewDocument();
CFrameWnd* pNewFrame = pDocTemplate->CreateNewFrame(pDoc/ *GetDocument()* /,
                                                    NULL/ *(CFrameWnd*)AfxGetMainWnd()* /);
// Activate the frame and set its active view
pDocTemplate->InitialUpdateFrame(pNewFrame, NULL);

CPeachPlorerView* pView = (CPeachPlorerView*)pNewFrame->GetActiveView();

pView->SetRegisterAsBrowser(TRUE);

*ppDisp = pView->GetApplication();

Unfortunately the new frame is parented to the previous one. I think the CDocTemplate framework inherit the same CWinApp. So when I close the parent the child is closed to.

The best way would be to launch a new instance of my application, and keep a handle on it so that I can pass the IDispatch interface (ppDisp). I mean initializing the SDI from another. I've no idea on how to do this. Can somebody help me ?

Yarp

ModifyStyle

Hans Ruck22-Jul-02 6:02

Hans Ruck

22-Jul-02 6:02

What is the Win32 API equivalent of MFC's ModifyStyle?

rechi

Re: ModifyStyle

Paul M Watt22-Jul-02 6:27

Paul M Watt

22-Jul-02 6:27

LONG lStylesRemove;
LONG lStylesAdd;

//C: Get the current styles
LONG lStyle = ::GetWindowLong(hWnd, <FLAGS>);
//C: Remove the unwanted styles.
lStyle &= ~lStylesRemove;
//C: Add the new styles that you want.
lStyle |= lStylesAdd;
//C: Modify the changes back into the window.
::SetWindowLong(hWnd, lStyle);

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: ModifyStyle

Hans Ruck22-Jul-02 6:43

Hans Ruck

22-Jul-02 6:43

OK,

.
What about ModifyStyleEx? I had problems once trying the way you wrote above.

rechi

Re: ModifyStyle

Paul M Watt22-Jul-02 8:33

Paul M Watt

22-Jul-02 8:33

First off I made a mistake in the way that I called GetWindowLong. It should be called like this

::GetWindowLong(hWnd, GWL_STYLE);

and SetWindowLong like this:

::SetWindowLong(hWnd, GWL_STYLE, lStyle);

As far as the Ex styles, it should work exactly the same except that you will use the GWL_EXSTYLE flag instead.

THere is however one thing that I just thought of, if you are modifying a style that deals with the window frame, you will need to make a call to SetWindowPos in order to force the window to incorporate the new style changes into your window.

I found the code directly out of the ModifySTyle function in MFC, here is how they do it.

ASSERT(hWnd != NULL);
DWORD dwStyle = ::GetWindowLong(hWnd, nStyleOffset);
DWORD dwNewStyle = (dwStyle & ~dwRemove) | dwAdd;
if (dwStyle == dwNewStyle)
    return FALSE;

::SetWindowLong(hWnd, nStyleOffset, dwNewStyle);
if (nFlags != 0)
{
    ::SetWindowPos(hWnd, NULL, 0, 0, 0, 0,
        SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | nFlags);
}

Good Luck

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

classview info not accessible ???

ns22-Jul-02 5:38

22-Jul-02 5:38

I loaded a project I brought in from home into VS at work and it says classview info isnt accessible so classsview pane is unpopulated. Its not read only or anything...
Help! I need the class info.

Re: classview info not accessible ???

Renjith Ramachandran22-Jul-02 6:06

Renjith Ramachandran

22-Jul-02 6:06

just delete the .clw ,.aps,.npc from your workspace folder and open the workpace agin that will work.

Renjith-CPian.

Re: classview info not accessible ???

ns22-Jul-02 6:39

22-Jul-02 6:39

Thanks so much! This problem has been so pesky! Appreciate it,
ns

Trouble with Radio Buttons

Anonymous22-Jul-02 4:56

Anonymous

22-Jul-02 4:56

I'm making a standard MFC app with one dialog. On the dialog I have placed 2 radio buttons. When I run my program none of the radio buttons is checked. How do I make one of the default checked when I start my program?

Frown | :(

Re: Trouble with Radio Buttons

Navin22-Jul-02 5:36

Navin

22-Jul-02 5:36

Do you have a member variable set up to handle the radio buttons (through ClassWizard)? If so, in your constructor, set it to 0 or 1 in the class constructor (depending on which radio button you want checked.)

If not, you need to set up control classes for each radio button, and in the OnInitDialog function, call:
yourButtonObject.SetCheck(1);
for the button you want to have checked.

Even if you win the rat race, you're still a rat.

Re: Trouble with Radio Buttons

Renjith Ramachandran22-Jul-02 6:35

Renjith Ramachandran

22-Jul-02 6:35

make a contol variable and control variable.SetCheck(1);

Renjith-CPian.

imitating mouse clicks

NickOne22-Jul-02 4:34

NickOne

22-Jul-02 4:34

Hello all,

I would like to simulate the mouse clicking and selecting commands. Basically, if I press a button in a toolbar, I want it's function to run. For instance the "New" button, or the "Open" button in the Word toolbar, will obviously create a new file, or open a selected a file.

What I would like to do, is know how to send a message saying "I clicked on a Toolbar button!" to the project.

I'd also like to know ho to do this from the DropDown Menu. I'd liek to be able to say I selected a Drop Down Menu command without doing any of the selecting the command from the drop down menu (call me lazy, hehehhehhe).

If anybody knows how to do this, that'd be cool if they could show me how or show me where I could learn,

Thanks a bunch

treeview check box color ?

insanely42022-Jul-02 4:25

insanely420

22-Jul-02 4:25

Greetings...

I have custom draw treeview control. I am able to change the default color of the treeview by using the following code :

case NM_CUSTOMDRAW :

case CDDS_CUSTOMDRAW:
return CDDS_ITEMPAINT:

case CDDS_ITEMPAINT:
/*
changing the color of the text here
*/

How can I trap the drawing of the checkbox so that i can chage the color in which the check box is drawn ?

Please help...

Ritesh

Re: treeview check box color ?

Shog⁹22-Jul-02 12:58

Shog⁹

22-Jul-02 12:58

insanely420 wrote:
How can I trap the drawing of the checkbox so that i can chage the color in which the check box is drawn ?

Why bother? Just draw some nice looking checkbox icons or bitmaps & put them in the tree's state item image list (TVSIL_STATE). That's where the default ones come from Smile | :)

Shog⁹
--

DestroyWindow and MDI view...???

ns22-Jul-02 3:52

22-Jul-02 3:52

I did a destroy WIndow on a view from another view. Well, the view didnt vanish like i thought it would. But if I dragged view1 over it, it made a big white area where view2 was. I tried invalidate() but thats not it.. Shouldnt view2 have vanished? WHat should I do to make it vanish?

Thanks,
ns

GetOpenFileName unhandled exception.

redeemer22-Jul-02 3:08

redeemer

22-Jul-02 3:08

here's the code, when i get to the GetOpenFileName line it gives me an unhandled exception, i can't figure out what's wrong, here's the code:

void OnBrowse()
{
	OPENFILENAME ofn;
	char szFileName[MAX_PATH+1];
	const char szFilter[] = "All Files (*.*)\0" "*.*\0";

	szFileName[0] = '\0';
	ofn.lStructSize = sizeof(OPENFILENAME);
	
	ofn.hwndOwner = ghWnd;
	ofn.lpstrFilter = szFilter;
	ofn.lpstrCustomFilter = (LPSTR)NULL;
	ofn.nFilterIndex = 1;
	ofn.lpstrFile = szFileName;
	ofn.nMaxFile = sizeof(szFileName);
	ofn.lpstrFileTitle = NULL;
	ofn.lpstrTitle = (LPSTR)NULL;
	ofn.Flags = OFN_ENABLESIZING | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_PATHMUSTEXIST | OFN_EXPLORER;
	ofn.nFileOffset = 0;
	ofn.nFileExtension = 0;
	ofn.lpstrDefExt = "txt";
 
	
	if (GetOpenFileName(&ofn))
		SetDlgItemText(ghWnd, IDC_LIST, szFileName);
}

Thanks in advance.

-Rune Svendsen

Re: GetOpenFileName unhandled exception.

Mike Upton22-Jul-02 4:08

Mike Upton

22-Jul-02 4:08

A couple of points I can see from looking at the documentation for GetOpenFileName().

What operating system are you using? There's a note in the platform SDK documentation that says:
"lStructSize Specifies the length, in bytes, of the structure.
Windows NT 4.0: In an application that is compiled with WINVER and _WIN32_WINNT >= 0x0500, use OPENFILENAME_SIZE_VERSION_400 for this member.
Windows 2000/XP: Use sizeof (OPENFILENAME) for this parameter."

This is more likely to be the problem - you've forgotten lpstrInitialDir. It should either be the directory you want the dialog to start in, or NULL.

Hope that helps!

"We are the knights who say Ni" _{(The Knights Who Say Ni)}

Re: GetOpenFileName unhandled exception.

redeemer22-Jul-02 5:01

redeemer

22-Jul-02 5:01

Thanks, it was the lpstrInitialDir.

GDI??

Anonymous22-Jul-02 2:04

Anonymous

22-Jul-02 2:04

Can someone give me some clues on how I can do the following things, eg what sort of messages I need to be overriding.

- I have an MDI app. When the MDI frame is loaded, I load a modeless dialog box acting as a toolbox. Id like to be able to drag things from this toolbox onto the view.
- Once things are dragged onto the (CView derived) view, id like to be able to drag them around, and possibly be able to link them up, eg when i ricght click on one of the nodes a line is extended, and when this is released on top of another node, things happen in the document.

Ive never been able to get much use out of Spyy++.

Re: GDI??

Christian Graus22-Jul-02 2:05

Christian Graus

22-Jul-02 2:05

Spy++ won't help you. You need to define classes to describe the objects you want to drag and drop, then you need a container in which to store them so you can draw the ones that are already there, and select them to move them.

Christian

come on all you MS suckups, defend your sugar-daddy now. - Chris Losinger - 11/07/2002

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