Beginner can't create window!?

[Jhd.Honza]

Hi,
I am new to C++, and I would like to use CreateWindow/Ex to display a normal window. Can somebody show me how to do it, please?

[Technocrat]

BOOL InitInstance(HANDLE hInstance, int nCmdShow)
{
    HWND hWnd;
    DWORD dwFlags = WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU;

    hWnd = CreateWindow(szClass, "Tutorial", dwFlags, 
                        200, 300, 300, 100, NULL, NULL, (HINSTANCE)hInstance, NULL);

    if(!hWnd)
        return FALSE;

    return TRUE;
} 

[parksie]

Technocrat -- it's now HINSTANCE rather than HANDLE for the instance handle

And Jhd -- are you new to C++ or Windows programming with C++?

http://www.parksie.net/Raw.zip (change LONG_PTR to LRESULT if you have any problems)

[Technocrat]

You know I dont know why it is that way in that program I took that snipit from. Thats strange

[Vlatko]

1. open visual c++
2. File > New
3. Click Projects tab
4. click Win32 Application and give it a name
5. click finish
6. click the File View Tab on TreeView
7. go to File > New
8. in the first tab Click C++ Source File and name it
9. Copy and paste the code in the new file
10. right click the Header folder and add Windows.h
11. click execute

#include <windows.h>
LRESULT CALLBACK WindowFunc(HWND, UINT, WPARAM, LPARAM);
char szWinNamw[] = "MyWin";
int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst,
				LPSTR kposzArgs, int nWinMode)


    {
    	HWND hwnd;
    	MSG msg;
    	WNDCLASSEX wcl;
    	wcl.cbSize = sizeof(WNDCLASSEX);
    	wcl.hInstance = hThisInst;
    	wcl.lpszClassName = "My Window";
    	wcl.lpfnWndProc = WindowFunc;
    	wcl.style = 0;
    	wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    	wcl.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
    	wcl.hCursor = LoadCursor(NULL, IDC_ARROW);
    	wcl.lpszMenuName = NULL;
    	wcl.cbClsExtra = 0;
    	wcl.cbWndExtra = 0;
    	wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
    	if(!RegisterClassEx(&wcl)) return 0;
    	hwnd = CreateWindow(
    		"My Window",
    		"Skeleton Window",
    		WS_OVERLAPPEDWINDOW,
    		CW_USEDEFAULT,
    		CW_USEDEFAULT,
    		CW_USEDEFAULT,
    		CW_USEDEFAULT,
    		HWND_DESKTOP,
    		NULL,
    		hThisInst,
    		NULL
    		);
    	ShowWindow(hwnd, nWinMode);
    	UpdateWindow(hwnd);
    	while(GetMessage(&msg, NULL, 0, 0))


        	{
        		TranslateMessage(&msg);
        		DispatchMessage(&msg);
        	}
        	return msg.wParam;
    }
    LRESULT CALLBACK WindowFunc(HWND hwnd, UINT message,
    							WPARAM wParam, LPARAM lParam)


        {


            	switch(message)	{
            	case WM_DESTROY:
            		PostQuitMessage(0);
            		break;
            	default:
            		return DefWindowProc(hwnd, message, wParam, lParam);
            	}
            	return 0;
        }

[parksie]

Don't add windows.h to your project...that'll confuse the compiler

Technocrat -- it used to be HANDLE for everything, until they started differentiating the handle types.

[Technocrat]

I pulled it out of a Novell SDK pack I am working with. They had backwards comp on everything they could, thats prob why it was like that.

Once again it would be nice to have a FAQ so poor Vlatko doesnt have to paste that code in every week when some on asks the same question.

[parksie]

Yeah...and that list of C++ tutorial sites