從父窗口爲子控件設置光標？

Question

如何從父窗口爲子窗口設置光標而不創建子類？

Answer 1

WM_SETCURSOR消息自動傳遞給父項，所以您可以在那裏處理它。如果子控件實際處理它，那麼你必須對它進行子類化。或者破解消息循環（yuck）。

Answer 2

TCHAR szButtonCoordinates[50]; 
RECT rect; 
switch (message) 
{ 
... 
case WM_MOUSEMOVE: 
    hWndButton = GetDlgItem (hWnd, IDC_BUTTON); 
    GetClientRect (hWndButton, &rect); 
    MapWindowPoints (hWndButton, hWnd, (LPPOINT) &rect, 2); 
    // wsprintf (szButtonCoordinates, _T("Top: %d, Left: %d, Bottom: %d, Right: %d."),rect.top, rect.left, rect.bottom, rect.right); 
    if (((LOWORD (lParam) >= rect.left) && (LOWORD (lParam) <= rect.right)) && ((HIWORD (lParam) >=rect.top) && (HIWORD (lParam) <= rect.bottom))) 
    { 
     //MessageBox (hWndProg3, szButtonCoordinates, _T("Button Coordinates"), MB_ICONINFORMATION); 
     SetCursor (LoadCursor (NULL, IDC_CROSS)); 
     } 
     break; 
... 
}