huangyhg

msdn 中的例子
The following sample program toggles the NUM LOCK light (on Windows NT only) by using keybd_event() with a virtual key of VK_NUMLOCK.

#include <windows.h>

void SetNumLock( BOOL bState )
{
BYTE keyState[256];

GetKeyboardState((LPBYTE)&keyState);
if( (bState && !(keyState[VK_NUMLOCK] & 1)) ||
(!bState && (keyState[VK_NUMLOCK] & 1)) )
{
// Simulate a key press
keybd_event( VK_NUMLOCK,
0x45,
KEYEVENTF_EXTENDEDKEY | 0,
0 );

// Simulate a key release
keybd_event( VK_NUMLOCK,
0x45,
KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP,
0);
}
}

void main()
{
SetNumLock( TRUE );
}
--------------------------------------------------------------------------------

LPCTSTR lpWindowName = _T("QQ用户登录");
CWnd *pDialog = FindWindow(NULL, lpWindowName);
CWnd * pChild = pDialog->GetWindow(GW_CHILD);

CString sText;

for (; pChild; )
{
pChild->GetWindowText(sText);
if (sText == _T("deg"))
pChild->SetWindowText("mdeg");

pChild = pChild->GetNextWindow(GW_HWNDNEXT);
}

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