Error 87 from RegisterClassEx()

[The Wazaa]

Hi
I'm creating a game engine in openGL and first of all: please don't say that I should post this somewhere else - it's the window creation that I got problems with so I think that it fits right in here.

Anyway, I set a lot of parameters to a WNDCLASSEX variable and pass it on to RegisterClassEx(). Unfortunatly it returns 0 and gives the error message 87 (invalid parameter) from GetLastError. I have tried everything, including changing some parameters in the initWindowClass function but nothing seems to work, here is my code:

//Code in main.cpp - call for the class:
wWindow mainWindow(WndProc, hInstance);
	mainWindow.createGLWindow(className, windName, SCREEN_HEIGHT, SCREEN_WIDTH, 32);



//code in init.h - declaration of the class:
class wWindow
{
public:
	wWindow(WNDPROC tWndProc, HINSTANCE hInst);
	~wWindow();

	HWND hwnd;
	HINSTANCE hinstance;
	HDC hdc;
	WNDCLASSEX wndclass;
	WNDPROC wndproc;
	HGLRC hrc;
	LPCSTR tclassName;
	bool wWindow::createWindow(LPCSTR className, LPCSTR windowName,  LPCSTR menuName, int height, int width);
	bool wWindow::createGLWindow(LPCSTR className, LPCSTR windowName, int height, int width, int bits);
};



//code in Init.cpp - which contains the class:
wWindow::wWindow(WNDPROC tWndProc, HINSTANCE hInst)
{
	wndproc = tWndProc;
	hdc = NULL;
	hinstance = hInst;
}


bool wWindow::createGLWindow(LPCSTR className, LPCSTR windowName, int height, int width, int bits)
{
	wndclass = initWindowClass(className, hinstance, wndproc, NULL, NULL);
	SetLastError(0);
	DWORD eh = GetLastError();
	RegisterClassEx(&wndclass);
	eh = GetLastError();
	hwnd = createWindowR(className, windowName, height, width, hwnd, hinstance);
	hdc = GetDC(hwnd);

	setPiFD(SCREEN_HEIGHT, SCREEN_WIDTH, 16, hdc);
    
    if (!(hrc = wglCreateContext(hdc)))
	{
		MessageBox(NULL, "Error creating hRC", "Error", NULL);
	}
            
    wglMakeCurrent(hdc, hrc);
       
    initGL();
    
    ReSizeGLScene(SCREEN_WIDTH, SCREEN_HEIGHT);
    ShowWindow(hwnd, SW_SHOW);
    UpdateWindow(hwnd);
	return true;
}

//The initWindowClass and createWindow functions:

NDCLASSEX initWindowClass(LPCTSTR className, HINSTANCE hinst, WNDPROC wndproc, LPCTSTR menuName, HBRUSH backGround)
{
	WNDCLASSEX wndClass;

     wndClass.cbSize = sizeof(WNDCLASSEX);
     wndClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
     wndClass.lpfnWndProc = wndproc;
     wndClass.cbClsExtra = 0;
     wndClass.cbWndExtra = 0;
     wndClass.hInstance = hinst;
     wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
     wndClass.hbrBackground = backGround;
     wndClass.lpszMenuName = menuName;
     wndClass.lpszClassName = className;
			 
     return wndClass;
}

HWND createWindowR(LPCTSTR className, LPCTSTR windName, int width, int height, HWND hwnd, HINSTANCE hinst)
{
     
     hwnd = CreateWindowEx(         NULL,
                                    className,
                                    windName,
                                    WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_OVERLAPPEDWINDOW,
                                    0, 0,
                                    width, height,
                                    NULL,
                                    NULL,
                                    hinst,
                                    NULL);
     if (!hwnd)
     {
		 MessageBox(NULL, "Error creating window", "ERROR", NULL);
        return NULL;  
        }
        return hwnd;
}

Help would be really appreciated -

The Wazaa

[Tonto]

WNDCLASSEX has an additional 'hIconSm' member.

[The Wazaa]

Thanks a lot. Its working perfect now

The Wazaa