WM_COMMAND产生的条件-白红宇

WM_COMMAND产生的条件

阅读量：5898 次

发布时间：2019-06-19

本文共 2059 字，大约阅读时间需要 6 分钟。

#include
    
     #include "allmenu.h"#include
     
      using namespace std;HMENU hmenu;HMENU haddmenu;//窗口函数LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam){ switch(message){/* case WM_INIT:   hmenu=GetMenu(hwnd);//该函数取得分配给指定窗口的菜单的句柄。   haddmenu=CreateMenu();   AppendMenu(haddmenu,MF_ENABLED,IDM_OPENBIG,"打开目标图像");   AppendMenu(haddmenu,HF_ENABLED,IDM_OPENSMALL,"打开模板图像");   AppendMenu(haddmenu,HF_ENABLED,IDM_EXIT,"退出");/* case WM_COMMAND:  switch(LOWORD(wParam))  {   hmenu=GetMenu(hwnd);   haddmenu=CreateMenu();   AppendMenu(haddmenu,MF_ENABLED,IDM_OPENBIG,"打开目标图像");   AppendMenu(haddmenu,HF_ENABLED,IDM_OPENSMALL,"打开模板图像");   AppendMenu(haddmenu,HF_ENABLED,IDM_EXIT,"退出");  }*/ case WM_DESTROY:  PostQuitMessage(0);  break; default:  return DefWindowProc(hwnd,message,wParam,lParam); } return 0;}//winmain函数int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInst,LPSTR lpszCmdLine,int nCmdShow){ MSG Msg; WNDCLASS wndclass; HWND hwnd; char lpszClassName[]="我的窗口"; char lpszTitle[]="MyWindows"; char lpszMenuName[]="menu"; hmenu=LoadMenu(hInstance,"hmenu"); wndclass.style=0; wndclass.lpfnWndProc=WndProc; wndclass.cbClsExtra=0; //窗口类无扩展 wndclass.cbWndExtra=0; //窗口实例无扩展 wndclass.hInstance=hInstance; //当前实例句柄 wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION); //窗口的最小化图标为默认值 wndclass.hCursor=LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName=lpszMenuName; wndclass.lpszClassName=lpszClassName; if(!RegisterClass(&wndclass)){  MessageBeep(0);  return false; } //创建窗口 hwnd=CreateWindow(  lpszClassName,  lpszTitle,  WS_OVERLAPPEDWINDOW,  CW_USEDEFAULT,  CW_USEDEFAULT,  CW_USEDEFAULT,  CW_USEDEFAULT,  NULL,  hmenu,  hInstance,  NULL  ); ShowWindow(hwnd,nCmdShow); UpdateWindow(hwnd); while(GetMessage(&Msg,NULL,0,0)){  TranslateMessage(&Msg);  DispatchMessage(&Msg); } return Msg.wParam;}//allmenu.h文件#define MYMENU 10#define IDM_OPENSMALL 11#define IDM_OPENBIG 12#define IDM_CLOSE 13#define IDM_EXIT 14