檢查TreeView ScrollBar可見性

Question

如何檢查TreeView中的垂直滾動條是否可見？

Answer 1

您必須執行一些p/invoke來獲取TreeView的樣式。

private const int GWL_STYLE = -16; 
    private const int WS_VSCROLL = 0x00200000; 
    [DllImport("user32.dll", ExactSpelling = false, CharSet = CharSet.Auto)] 
    private static extern int GetWindowLong(IntPtr hWnd, int nIndex); 

    bool VScrollVisible() 
    { 
     int style = GetWindowLong(myTreeView.Handle, GWL_STYLE); 
     return ((style & WS_VSCROLL) != 0); 
    }