Detecting Window class.

**Queatrix** · 08-09-2005

I tried this:

Code:

if(hWindow == "Button"){ }
else if(hWindow == "Edit"){ }
else if(hWindow == "Static"){ }
else { }

But it doesn't work.
Why?
And how could I succesfully make my prog. read what type of Window it is?

Thanks, August.

**Stoned_Coder** · 08-09-2005

GetClassInfoEx()

**Ken Fitlike** · 08-10-2005

GetClassName will get you the window class name.

GetClassInfoEx requires the actual window class name itself as a parameter.

**Stoned_Coder** · 08-10-2005

he knew the names,he wanted to query system classes.

**Ken Fitlike** · 08-10-2005

You're right - thanks for clarifying.

**Queatrix** · 08-11-2005

Like this: (?)

Code:

GetClassName(hWindow, tClassName, 8);
if(tClassName == "Button"){ }

**Dante Shamest** · 08-11-2005

Not exactly. I believe for character array comparisons, you should use one of the strcmp functions.

Code:

if( strcmp(tClassName,"Button")==0 ){ }

**Queatrix** · 10-08-2005

Still doesn't work.

**Dante Shamest** · 10-08-2005

Post your code then.

Edit: I'll post a working version.

Code:

/*------------------------------------------------------------------------------
GetClassName Demo 
  
Author: Andrew Lim
------------------------------------------------------------------------------*/
#include <windows.h>

HWND button ;

LRESULT CALLBACK WndProc( HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam )
{
  switch(msg)  
  {
    case WM_CREATE:
      {
        button = CreateWindow( "bUTtOn", "Click me!", WS_CHILD|WS_VISIBLE,
                               10, 10, 100, 22, hwnd, 0, GetModuleHandle(0),
                               0 ); 
                               
        return 0 ;                               
      }
      
    case WM_COMMAND:
      {
        HWND control = (HWND) lParam ;
        
        if ( control == button )
        {
          TCHAR buffer[256];
          GetClassName( button, buffer, 256 );
          
          if ( !strcmp(buffer,"Button") )
          {
            MessageBox( hwnd, buffer, "Button Class Name", 0 );
          }
        }
        
        return 0 ;
      }
    
    case WM_DESTROY:
      {
        PostQuitMessage(0);
        return 0;
      }
      
    default: return DefWindowProc(hwnd,msg,wParam,lParam);
  }
}

int WINAPI WinMain( HINSTANCE hInst, HINSTANCE hPrev, LPSTR args, int nShow )
{
  WNDCLASS wc = {0};
  wc.lpszClassName = TEXT( "GetClassNameDemo" );
  wc.hInstance     = hInst ;
  wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
  wc.lpfnWndProc   = WndProc ;
  wc.hCursor       = LoadCursor(0,IDC_ARROW);
  
  RegisterClass(&wc);
  CreateWindow( wc.lpszClassName,TEXT("GetClassName Demo"),
                WS_OVERLAPPEDWINDOW|WS_VISIBLE,
                0,0,300,200,0,0,hInst,0);
  
  MSG  msg ;  
  while( GetMessage(&msg,0,0,0) > 0 ) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }
  return (int)msg.wParam;
}

**Queatrix** · 10-08-2005

Thanks, I see my problem was that I was using a char var instead of a TCHAR var.

**Dante Shamest** · 10-08-2005

It should still work with a char array, as long as UNICODE isn't defined.

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