Introduction - If you have any usage issues, please Google them yourself
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
LRESULT CALLBACK MDIChildWndProc(HWND hwnd, UINT Message, WPARAM wParam,
LPARAM lParam)
char g_szAppName[] = "MyMDIWindow"
char g_szChild[] = "MyMDIChild"
HINSTANCE g_hInst
HWND g_hMDIClient, g_hStatusBar, g_hToolBar
HWND g_hMainWindow