学步园

Syntax

BOOL WINAPI GetGestureInfo(_In_   HGESTUREINFO hGestureInfo, _Out_  PGESTUREINFO pGestureInfo);

Parameters

hGestureInfo [in]

The gesture information handle.

pGestureInfo [out]

A pointer to the gesture information structure.

Return value

If the function succeeds, the return value is nonzero.    

If the function fails, the return value is zero. To get extended error information, use the GetLastError function.

Remarks

    The cbSize member of the GESTUREINFO structure passed in to the function must be set before the function is called. Otherwise, calls to GetLastError will return ERROR_INVALID_PARAMETER (87 in decimal).   If an application processes a WM_GESTURE message, it is responsible for   closing the handle using CloseGestureInfoHandle. Failure to do so may result in   process memory leaks. 

   If the message is passed to DefWindowProc, or is forwarded using   one of the PostMessage or SendMessage classes of API functions, the handle   is transferred with the message and need not be closed by the application. 

Examples

    GESTUREINFO gestureInfo = {0};
    gestureInfo.cbSize = sizeof(gestureInfo);
    BOOL bResult = GetGestureInfo((HGESTUREINFO)lParam, &gestureInfo);

    if (!bResult){                
        DWORD err = GetLastError();                                       
    }
    

Requirements