Question

在 onkeydown() 处理程序中，我可以获得 [ 的键值为 219；然而，[ 的实际字符值是 91。有没有办法将这两者映射起来呢？

Answer 1

如果您正在使用 Windows，您应该研究 ToUnicodeEx 函数。

Answer 2

step 1: Open VC++ 6.0
Step 2: File --> New --> Projects --> Win32 Application
Give your project name
Step 3: File --> New --> Files --> C++ Source File
Give your file name
step 4: In your CPP file

/* Mfc program to handle virtual key codes. */
#include<afxwin.h>
class myframe : public CFrameWnd
{
public: 
    myframe()
    {
        Create(0,"Menu Program");
    }
    void OnKeyDown(UINT n)
    {
        switch(n)
        {
        case VK_LEFT:
            MessageBox("Left Arrow","Hellow");
            break;
        case VK_RIGHT:
            MessageBox("Right Arrow","Hellow");
            break;
        case VK_UP:
            MessageBox("Up Arrow","Hellow");
            break;
        case VK_DOWN:
            MessageBox("Down Arrow","Hellow");
            break;
        case VK_NUMPAD0:
            MessageBox("Number ZERO","Hellow");
            break;
        case VK_NUMPAD9:
            MessageBox("Number NINE","Hellow");
            break;
        case VK_SPACE:
            MessageBox("Space Bar","Hellow");
            break;
        case VK_BACK:
            MessageBox("BACK KEY","Hellow");
            break;
        case VK_SHIFT:
            MessageBox("SHIFT KEY","Hellow");
            break;
        }
    }       
    DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP(myframe,CFrameWnd)
ON_WM_KEYDOWN()
END_MESSAGE_MAP()
class myapp : public CWinApp
{
public:
    int InitInstance()
    {
        m_pMainWnd=new myframe();
        m_pMainWnd->ShowWindow(3);      
        return 1;
    }
};
myapp app;

step 5: Project --> settings --> Choose MFC as shared DLL
Step 6: Bulid --> Compile
step 7: Build --> Build
Step 8: Build --> Execute

Answer 3

MapVirtualKey() 也非常有用。

Answer 4

您可以尝试使用Windows.h库中内置的MapVirtualKey(UINT uCode,UINT uMapType)函数。

一个例子就是:

// Converts 0x1B (escape key) to the unshifted character value 27
MapVirtualKey( 0x1B, MAPVK_VK_TO_CHAR);

OR (或者)

if (GetAsyncKeyState(VK_SHIFT) & (1 << 16)) {
    std::cout << MapVirtualKey(VK_SHIFT,MAPVK_VK_TO_CHAR);
}

您可以在MapVirtualKeyA函数（winuser.h）中阅读更多。

友情链接