这个是从 Windows程序设计第五版 改来的；我还没完全理解；先初步看一下；
#include <windows.h>
#include "resource.h"#define INIT_MENU_POS 0
#define HELLO_MENU_POS 2#define IDM_FIRSTCHILD 50000LRESULT CALLBACK FrameWndProc(HWND, UINT, WPARAM, LPARAM);
BOOL CALLBACK CloseEnumProc(HWND, LPARAM);
LRESULT CALLBACK HelloWndProc(HWND, UINT, WPARAM, LPARAM);typedef struct tagHELLODATA
{UINT iColor;COLORREF clrText;
}
HELLODATA, *PHELLODATA;// global variables
TCHAR szAppName[] = TEXT("MDIDemo");
TCHAR szFrameClass[] = TEXT("MdiFrame");
TCHAR szHelloClass[] = TEXT("MdiHelloChild");HINSTANCE hInst;
HMENU hMenuInit, hMenuHello;
HMENU hMenuInitWindow, hMenuHelloWindow;int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow)
{HACCEL hAccel;HWND hwndFrame, hwndClient;MSG msg;WNDCLASS wndclass;hInst = hInstanc
)
