'加入一个按钮,然后把窗体的ScaleMode属性设为 3 - Pixel 。然后复制一下代码试一试 Option Explicit Private Declare Function CreateEllipticRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long Private Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As LongPrivate Sub Form_Load() Dim hRgn As Long hRgn = CreateEllipticRgn(0, 0, Command1.Width, Command1.Height) SetWindowRgn Command1.hWnd, hRgn, True End Sub
Option Explicit
Private Declare Function CreateEllipticRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Private Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As LongPrivate Sub Form_Load()
Dim hRgn As Long
hRgn = CreateEllipticRgn(0, 0, Command1.Width, Command1.Height)
SetWindowRgn Command1.hWnd, hRgn, True
End Sub