更新时间:2016-01-07 15:26:23浏览次数:1+次
SHORT GetKeyState(int nVirtKey);
函数只有一个参数,即虚拟键码。返回值为SHORT类型,即短整型。GetKeyState函数是用来获取指定的虚拟键码的按键的状态。得到的状态表示按键是按下了还是弹起的,还是状态切换(大小写状态、数字键盘锁状态)。#include "windows.h"
#include <tchar.h>
// - 项目是Unicode字符集
LRESULT CALLBACK WinProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
switch (message)
{
case WM_KEYDOWN:
{
//第一种返回值,检测按键的按下或弹起
int iState = GetKeyState(VK_CONTROL);
if(iState<0)
{
MessageBox(NULL,_T("Ctrl键按下"),_T(""),0);
}
else
{
MessageBox(NULL,_T("Ctrl键未按下"),_T(""),0);
}
//第二种返回值,检测状态灯的情况
iState = GetKeyState(VK_NUMLOCK);
if (iState&0x0001)
{
MessageBox(NULL,_T("数字键盘灯亮"),_T("提示"),0);
}
else
{
MessageBox(NULL,_T("数字键盘灯熄灭"),_T("提示"),0);
}
return 0;
}
case WM_LBUTTONDOWN:
{
int iState = GetKeyState(VK_CONTROL);
if(iState<0)
{
MessageBox(NULL,_T("Ctrl键按下"),_T(""),0);
}
else
{
MessageBox(NULL,_T("Ctrl键未按下"),_T(""),0);
}
//第二种返回值,检测状态灯的情况
iState = GetKeyState(VK_NUMLOCK);
if (iState&0x0001)
{
MessageBox(NULL,_T("数字键盘灯亮"),_T("提示"),0);
}
else
{
MessageBox(NULL,_T("数字键盘灯熄灭"),_T("提示"),0);
}
return 0;
}
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
break;//跳出到默认处理
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrev,LPSTR lpCmd,int iShow)
{
TCHAR ClassName[] = _T("MyClass");
TCHAR title1[] = _T("C++技术网http://www.cjjjs.com");
WNDCLASS wndClass;
wndClass.cbClsExtra=0;
wndClass.cbWndExtra=0;
wndClass.hbrBackground= (HBRUSH)GetStockObject(WHITE_BRUSH);
wndClass.hCursor=LoadCursor(NULL,IDC_HAND);
wndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndClass.hInstance = hInstance;
wndClass.lpfnWndProc = WinProc;
wndClass.lpszClassName = ClassName;
wndClass.lpszMenuName=NULL;
wndClass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndClass))return 0;
HWND hwnd = CreateWindow(ClassName,title1,WS_OVERLAPPEDWINDOW,0,0,650,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
MSG msg;
while (GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
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