椭圆窗口中的任意位置拖动窗体为什么实现不了，椭圆窗体、任意位置、拖动
Private Type point拖动 VB 椭圆窗体
X As Long
Y As Long
End Type
Private Declare Function GetCursorPos Lib "user32" (lpPoint As point) As Long
Private Declare Function CreateRectRgn Lib "gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
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 CombineRgn Lib "gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long
Private Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal Redraw As Long) As Long
Dim point1 As point, point2 As point, point3 As point
Dim xa As Single, ya As Single
Private Sub Form_ReSize()
Image1.Width = Me.ScaleWidth
Image1.Height = Me.ScaleHeight
Dim Outer_rgn As Long
Dim Inner_rgn As Long
Dim Combined_rgn As Long
Dim wid As Single
Dim hgt As Single
Dim border_width As Single
Dim title_height As Single
wid = Me.ScaleWidth
hgt = Me.ScaleHeight
border_width = (wid - Me.ScaleWidth) / 2
title_height = hgt - border_width - Me.ScaleHeight
Outer_rgn = CreateRectRgn(border_width, title_height, wid, hgt)
Inner_rgn = CreateEllipticRgn(border_width + ScaleWidth * 0.1, title_height + ScaleHeight * 0.1, ScaleWidth * 0.9, ScaleHeight * 0.9)
Combined_rgn = CreateRectRgn(0, 0, 0, 0)
CombineRgn Combined_rgn, Outer_rgn, Inner_rgn, 1
SetWindowRgn Me.hWnd, Combined_rgn, True
End Sub
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
xa = X
ya = Y
End Sub
Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = 1 Then Me.Move Me.Left + X - xa, Me.Top + Y - ya
End Sub
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function ReleaseCapture Lib "user32" () As Long
Private Const WM_SYSCOMMAND = &H112
Private Const SC_MOVE = &HF010&
Private Const HTCAPTION = 2
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Call ReleaseCapture
Call SendMessage(Me.hWnd, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, ByVal 0&)
End Sub
