Thread: Problem ending application

I am very new to C. I have created an application that calls a DLL. The DLL is used to create a dialog with a bunch of labels and edit boxes on them. On the dialog is a Quit button. The DLL handles this as well. When the Quit button is clicked, I need to close the entire application, the dialog as well and the parent form. Here's what I have so far:

Code:

LRESULT CALLBACK ParseDialogProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{
  static HWND hWndChild;
  char* cBuffer;
  int iLength;
  const int iMaxBufferSize = 500;
  char sMsgBuffer[iMaxBufferSize];

  switch(message)
  {
    case WM_INITDIALOG:
      hWndChild = (HWND)GetParent(hWnd);
      break;
    case WM_COMMAND:
        switch(LOWORD(wParam))
        {
          case btnParse:
   //there is some code here but it all works so i omitted it
          case btnExit:	
            SendMessage(hWndChild,WM_CLOSE,NULL,NULL);
            break;		
        }
        break;
      default:
        return DefWindowProc(hWnd,message,wParam,lParam);
      break;
  }
return 0;
}

When I debug, it hits the SendMessage(hWndChild, WM_CLOSE,NULL,NULL) line, then goes to the return line. And I get this error then: Unhandled exception in ParseName.exe: 0xC0000005: Access Violation.

Add something like:

Code:

case WM_CLOSE:

to your switch statement above, and let it do the necessary operations to exit the application.

--
Mats

You are sending the WM_CLOSE message but you are not handling it; don't expect it to close the window by it's own.

Code:

switch(message)
{
case WM_CLOSE:
 DestroyWindow(hwnd);
break;
}

---
Mole42, it's important to understand how API works before working with MFC.

Originally Posted by Mole42

Is there a reason your not using MFC? It was created to make life easier (and handles all this stuff for you), rather than the complex method which you seem to be using.

This is C, not C++.