Programming Windows®, Fifth Edition

A Sample MDI Implementation

The MDIDEMO program, shown in Example 19-1, demonstrates the basics of writing an MDI application.

Example 19-1. The MDIDEMO program.

MDIDEMO.C /*-------------------------------------------------------- MDIDEMO.C -- Multiple-Document Interface Demonstration (c) Charles Petzold, 1998 --------------------------------------------------------*/ #include <windows.h> #include "resource.h" #define INIT_MENU_POS 0 #define HELLO_MENU_POS 2 #define RECT_MENU_POS 1 #define IDM_FIRSTCHILD 50000 LRESULT CALLBACK FrameWndProc (HWND, UINT, WPARAM, LPARAM) ; BOOL CALLBACK CloseEnumProc (HWND, LPARAM) ; LRESULT CALLBACK HelloWndProc (HWND, UINT, WPARAM, LPARAM) ; LRESULT CALLBACK RectWndProc (HWND, UINT, WPARAM, LPARAM) ; // structure ...