c++ GetAsyncState() 函数

函数原型

SHORT GetAsyncKeyState(int vKey);

例：若判断 回车键

if（GetAsyncKeyState（VK_RETURN）&0x8000）

(

return 0;

)

按下Enter 返回值 0 ；

附其他常用键位：
VK_LBUTTON            
鼠标左键                      0x01
VK_RBUTTON             鼠标右键                      0x02
VK_CANCEL              Ctrl + Break                  0x03
VK_MBUTTON             鼠标中键                      0x04

VK_BACK                Backspace
键       0x08
VK_TAB                 Tab 键                        0x09

VK_RETURN             
回车键                        0x0D

VK_SHIFT               Shift
键                      0x10
VK_CONTROL             Ctrl 键                       0x11
VK_MENU                Alt 键                 0x12
VK_PAUSE               Pause 键                      0x13
VK_CAPITAL             Caps Lock 键                  0x14

VK_ESCAPE              Esc
键                        0x1B

VK_SPACE              
空格键         0x20
VK_PRIOR               Page Up 键                    0x21
VK_NEXT                Page Down 键                  0x22
VK_END                 End 键                        0x23
VK_HOME                Home 键                       0x24
VK_LEFT                左箭头键                      0x25
VK_UP                  上箭头键                      0x26
VK_RIGHT               右箭头键                      0x27
VK_DOWN                下箭头键                      0x28
VK_SNAPSHOT            Print Screen 键               0x2C
VK_Insert              Insert 键                     0x2D
VK_Delete              Delete 键                     0x2E

'0' – '9'            
数字 0 - 9                    0x30 - 0x39
'A' – 'Z'             字母 A - Z                    0x41 - 0x5A

VK_LWIN               
左WinKey(104键盘才有)        
0x5B
VK_RWIN                右WinKey(104键盘才有)        
0x5C
VK_APPS                AppsKey(104键盘才有)          0x5D

VK_NUMPAD0           
小键盘 0
键                    0x60
VK_NUMPAD1            小键盘 1
键                    0x61
VK_NUMPAD2            小键盘 2
键                    0x62
VK_NUMPAD3            小键盘 3
键                    0x63
VK_NUMPAD4            小键盘 4
键                    0x64
VK_NUMPAD5            小键盘 5
键                    0x65
VK_NUMPAD6            小键盘 6
键                    0x66
VK_NUMPAD7            小键盘 7
键                    0x67
VK_NUMPAD8            小键盘 8
键                    0x68
VK_NUMPAD9            小键盘 9
键                    0x69

VK_F1 - VK_F24       
功能键F1 – F24               0x70 - 0x87

VK_NUMLOCK            Num Lock
键                   0x90
VK_SCROLL             Scroll Lock 键                0x91

/*

SHORT VK = GetAsyncKeyState(VK_RETURN);
    if (VK & 0X8000)
    {

　　 //如果回车键按下则程序退出
        exit(0);
    }

*/