Message Handler for Dialog

[koraykazgan]

Hi there,

I like to programm a Win32 application, without using MFC. I can create a Window by code, but it is not easy to design the entire window with all its controls on it. So I want to use a resource and put the controls onto the dialog resource. Then I want to use this resource as template for my windows.

With the CreateDialog function I can get the resources HWND. Then with the function ShowFucntion I display the dialog. But the dialog responds to no message. I have written a DialogMessageHandler function, which processes the events.

What I want to know is, how I bind the MessageHandler Function to the dialog.

I tried to cast the functions name to DLGPROC and then send it as parameter to the createdialog function, but I doesn't worked.

Thank a lot for your help,
Bye...

 

[timmay3141]

That is exactly what you need to do, give it a DLGPROC. How did it not work? Did it not compile? Be more specific and post the appropriate code.

 

[koraykazgan]

It compiles without any errors or warnings, but the dialog isn't shown on screen. When I set the lpDialogFunc parameter in CreateDialog to null, then the dialog is shown, but it responds to no message, because it doesn't have any message handler set.

So I wrote a message handler and set the lpDialogFunc parameter to the written function. But when I run my app, the dialog isn't shown, even if I use ShowWindow, after CreateWindow. Maybe I have to do something in the WM_SHOW or WM_CREATE event. But i dunno.

Here is the code:

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

LRESULT CALLBACK fnWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
HWND hWnd;
MSG msg;

hWnd = CreateDialog(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, (DLGPROC)fnWndProc);
if (!hWnd)
return 0;

ShowWindow(hWnd, nShowCmd);

while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

return 0;
}

LRESULT CALLBACK fnWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_DESTROY:
PostQuitMessage(WM_QUIT);
break;

default:
return DefDlgProc(hWnd, msg, wParam, lParam);
}

return 0;
}

Hopefully you can say me, what I have to do, to display the dialog on screen. But I don't want to use the ClassWizard, because it includes code in my project, which I don't want. I just want to create a resource, write a message handler, create an instance from the template, and set the written handler function to my dialog.

Thanks for your help,
bye...