CreateDialog and WM_INITDIALOG

[DeCoDeR]

Hi,
I create a dialog with resource editor, i also open the resource.rc as text and add CLASS tag.
Then i try to use CreateDialog api to show this window and do some processing.
Although i expect to receive WM_INITDIALOG message to initialize some variables i never get this message.
some part of code is below, and i will appreciate who tries to help me,
Kind Regards
---------

MSG msg;
static TCHAR szApp[]="Deneme";
HWND hwnd;
WNDCLASS wcl;

wcl.cbClsExtra = 0;
wcl.cbWndExtra = DLGWINDOWEXTRA;
wcl.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
wcl.hCursor = LoadCursor(NULL,IDC_ARROW);
wcl.hIcon = LoadIcon(NULL,IDI_APPLICATION);
wcl.hInstance = hInst;
wcl.lpfnWndProc = WndProc;
wcl.lpszClassName = szApp;
wcl.lpszMenuName = NULL;
wcl.style = CS_VREDRAW|CS_HREDRAW;

if(!RegisterClass(&wcl)) return 1;

hwnd = CreateDialog(hInst,MAKEINTRESOURCE(IDD_INFO_ADAPTERS),0,NULL);

ShowWindow(hwnd,nShow);

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

return msg.wParam ;
}

LRESULT CALLBACK WndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
BOOL bReturn;

switch(msg)
{
// i never get WM_INITDIALOG msg
case WM_INITDIALOG:
MessageBox(hwnd,"initial","initial",MB_OK);

SetDlgItemText(hwnd,IDC_EDIT_NAME,"Volkan Uzun"
return TRUE;

Read between the lines

 

[MKuiper]

Hi,


Your problem is the fourth parameter of CreateDialog:
hwnd = CreateDialog(hInst,MAKEINTRESOURCE(IDD_INFO_ADAPTERS),0,NULL);

It should be the address of a callback procedure. In this callback procedure you receive messages belonging to the dialog box and you must process them there, and not in the window procedure.

Your code must be something like:

INT_PTR CALLBACK MyDlgProc ( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
  switch ( uMsg )
     { case WM_INITDIALOG : ...
                            return ... ;
       case ... : ... ;
     }
  return FALSE; }

...

hwnd = CreateDialog(hInst,MAKEINTRESOURCE(IDD_INFO_ADAPTERS),0,(DLGPROC)MyDlgProc);

And remove the WM_INITDIALOG piece from the window procedure WndProc.

Marcel

 

[mseth]

If you want a Dialog as your main window, it might be best to call DialogBox( instead of CreateDialog(