RegisterClassEx and CreateWindowEx fails..

[techie.ashish]

Hello all..
I'm trying to make window with specific requirement.. But that's not my issue. It's related to RegisterClassEx and CreateWindowEx.. Both actually fails.. I've no idea why.. I put GetLastError on both.

After RegisterClassEx it shows Error 6 which means "The handle is invalid."

After CreateWindowEx it shows Error 203 which means "The system could not find the environment option that was entered."

Here's code snippet.. Please take a look.

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASSEX   wndclass ;
	 

     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) CreateSolidBrush(RGB(255,255,255));
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = "WndProc";
     
     if (!RegisterClassEx (&wndclass))
     {
          DWORD eRR = GetLastError();
          MessageBox (NULL, "Registration Fails","Error", MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindowEx(WS_EX_TOOLWINDOW |WS_EX_LAYERED| WS_EX_APPWINDOW,
						  "WndProc",  						
						   NULL,							
						   WS_POPUP,						
						   10,							
						   10,							
						   100,							
						   100,							
						   NULL,							
						   NULL,							
						   hInstance,						
                                                   NULL) ;	


	 DWORD eRR1 = GetLastError();

     ShowWindow (hwnd, iCmdShow) ;
     SetLayeredWindowAttributes(hwnd, RGB(255,255,255), 255, LWA_COLORKEY|LWA_ALPHA);

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

It also doesn't get into message loop..

Thanks..

[VictorN]

From MSDN article "WNDCLASSEX":

hInstance

Handle to the instance that contains the window procedure for the class.

Is hInstance you are assigning to wndclass.hInstance correct/valid?
Does this module contain the window procedure WndProc ?