写了一个小例子用来对桌面上的窗口进行管理,让窗口可以执行最大最小化隐藏关闭这4个操作,用EnumWindows枚举桌面窗口。
代码:
// enmuwindows.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#include "resource.h"
#define MAX_LOADSTRING 100
#define IDC_BUTTON 11
// Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text
HWND hwndList;
// static int num;//统计窗口个数
static HWND hwnd_parent;//父窗口句柄
// Foward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);
BOOL CALLBACK EnumWindowsProc(HWND,LPARAM);//回调函数原型
int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// hwnd_parent=GetDesktopWindow();
hwnd_parent=FindWindow(NULL,TEXT("SysListView32"));
// TODO: Place code here.
MSG msg;
HACCEL hAccelTable;
// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_ENMUWINDOWS, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_ENMUWINDOWS);
// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage is only necessary if you want this code
// to be compatible with Win32 systems prior to the 'RegisterClassEx'
// function that was added to Windows 95. It is important to call this function
// so that the application will get 'well formed' small icons associated
// with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_ENMUWINDOWS);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = (LPCSTR)IDC_ENMUWINDOWS;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
return RegisterClassEx(&wcex);
}
//
// FUNCTION: InitInstance(HANDLE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
TCHAR szHello[MAX_LOADSTRING];
LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
HWND hbutton;
TCHAR szCaption[MAX_PATH]={0};
TCHAR szSelect[10]={0};
int index=0;
HWND g_hwnd;
static HWND hwndCombobox;
switch (message)
{
case WM_CREATE:
//创建窗口列表
hwndList=CreateWindow(TEXT("combobox"),TEXT("my app"),WS_CHILD|WS_VISIBLE|LBS_STANDARD,
0,0,300,100,hWnd,(HMENU)10,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
hwndCombobox=CreateWindow(TEXT("combobox"),TEXT("my app"),WS_CHILD|WS_VISIBLE|LBS_STANDARD,
320,0,200,100,hWnd,(HMENU)12,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
//添加执行按钮
hbutton=CreateWindow(TEXT("button"),TEXT("执行"),WS_CHILD|WS_VISIBLE,
550,0,50,25,hWnd,(HMENU)11,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
//窗口行为选择
SendMessage(hwndCombobox,CB_ADDSTRING,0,(LPARAM)TEXT("最大化"));
SendMessage(hwndCombobox,CB_ADDSTRING,0,(LPARAM)TEXT("最小化"));
SendMessage(hwndCombobox,CB_ADDSTRING,0,(LPARAM)TEXT("隐藏"));
SendMessage(hwndCombobox,CB_ADDSTRING,0,(LPARAM)TEXT("关闭"));
break;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDC_BUTTON:
//MessageBox(hWnd,"a","b",0);
index=SendMessage(hwndList,CB_GETCURSEL,0,0);
SendMessage(hwndList,CB_GETLBTEXT,(WPARAM)index,(LPARAM)szCaption);
g_hwnd=FindWindow(NULL,szCaption);
SendMessage(hwndCombobox,CB_GETLBTEXT,(WPARAM)SendMessage(hwndCombobox,CB_GETCURSEL,0,0),(LPARAM)szSelect);
if(!lstrcmp(szSelect,TEXT("最大化")))
{
InvalidateRect(g_hwnd,NULL,FALSE);
ShowWindow(g_hwnd,SW_NORMAL);
ShowWindow(g_hwnd,SW_MAXIMIZE);
UpdateWindow(g_hwnd);
//ShowWindow(hwnd,SW_MAXIMIZE);
}
else if(!lstrcmp(szSelect,TEXT("最小化")))
{
ShowWindow(g_hwnd,SW_SHOWMINIMIZED);
}
else if(!lstrcmp(szSelect,TEXT("隐藏")))
{
ShowWindow(g_hwnd,SW_HIDE);
}
else
{
SendMessage(g_hwnd,WM_CLOSE,0,0);
}
break;
case IDM_ABOUT:
DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
RECT rt;
GetClientRect(hWnd, &rt);
//DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
EnumWindows(EnumWindowsProc,(LPARAM)NULL);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return TRUE;
}
break;
}
return FALSE;
}
BOOL CALLBACK EnumWindowsProc(HWND hwnd,LPARAM lParam)
{
if(hwnd)
{
TCHAR chText[MAX_PATH];
int len;
ZeroMemory(chText,MAX_PATH);
len=SendMessage(hwnd,WM_GETTEXTLENGTH,0,0)+1;
if((len>1)&&(len<MAX_PATH))
{
GetWindowText(hwnd,chText,sizeof(chText));
SendMessage(hwndList,CB_ADDSTRING,0,(LPARAM)chText);
return TRUE;
}
}
return TRUE;
}
对普通的应用程序窗口没啥问题,QQ确出事了,让一个QQ聊天窗口先隐藏然后最大化,最出现一个大大的嘿嘿的矩形,原来的聊天窗口物是人非了,这个问题大家看看如何处理呢?
附上编译好的EXE方便测试。三克油。
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