[聲明]Declare Function GetArcDirection Lib "gdi32" Alias "GetArcDirection" (ByVal hdc As Long) As Long[說明]畫圓弧的時候,判斷當前採用的繪圖方向 [參數表]hdc ------------ Long,要查詢的設備場景[返回值]Long,常數AD_COUNTERCLOCKWISE(逆時針)或AD_CLOCKWISE(順時針),零表示出錯