Thread: CreateWindowEx and last parameter..

Check the docs: CreateWindow()

gg

Here's a quick example of how to use the last parameter,

Code:

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
	case WM_CREATE:
		{
			CREATESTRUCT *cs = (CREATESTRUCT*)lParam;
			MessageBox(0,(char*)cs->lpCreateParams,"",0);
			delete[] cs->lpCreateParams;
			return 0;
		}
	case WM_CLOSE:
		DestroyWindow(hwnd); break;
	case WM_DESTROY:
		PostQuitMessage(0);  break;
	default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    HWND hwnd;
    MSG Msg;

    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style         = 0;
    wc.lpfnWndProc   = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = hInstance;
    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = "WindowCls";
    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

    if(!RegisterClassEx(&wc))
        return 0;

	char * passValue = new char[10];
	strcpy(passValue,"hello...");

    hwnd = CreateWindowEx(WS_EX_CLIENTEDGE, "WindowCls", "Window", WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, 100, 100, NULL, NULL, hInstance, passValue);

    if(hwnd == NULL)
        return 0;

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

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

Seriously though, the information was right there, all you had to do was read it.

-r1ck0r