Question

VB的frame BackColor透明

怎么把frame的背景色调成透明的啊（没有背景色）
在属性里找不到啊
应该写什么代码?

Answer 1

Private Declare Function GetWindowRect Lib "user32" (ByVal hWnd As _
Long, lpRECT As RECT) As Long

Private Declare Function GetClientRect Lib "user32" (ByVal hWnd As _
Long, lpRECT As RECT) 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 CreateRectRgn Lib "gdi32" (ByVal X1 As Long, _
ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long

Private Declare Function ScreenToClient Lib "user32" (ByVal hWnd As _
Long, lpPoint As POINTAPI) As Long

Private Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As _
Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long

Const RGN_AND = 1
Const RGN_COPY = 5
Const RGN_DIFF = 4
Const RGN_OR = 2
Const RGN_XOR = 3

Private Type POINTAPI
x As Long
Y As Long
End Type

Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Sub DataSamp()
Dim ad As Database
Dim aserch As QueryDef

End Sub

Public Sub MakeTransparent(frm As Form)
Dim rctClient As RECT, rctFrame As RECT
Dim hClient As Long, hFrame As Long

'获得窗口矩形区域
GetWindowRect frm.hWnd, rctFrame
GetClientRect frm.hWnd, rctClient

'将窗口矩形坐标转换为屏幕坐标
Dim lpTL As POINTAPI, lpBR As POINTAPI
lpTL.x = rctFrame.Left
lpTL.Y = rctFrame.Top
lpBR.x = rctFrame.Right
lpBR.Y = rctFrame.Bottom
ScreenToClient frm.hWnd, lpTL
ScreenToClient frm.hWnd, lpBR
rctFrame.Left = lpTL.x
rctFrame.Top = lpTL.Y
rctFrame.Right = lpBR.x
rctFrame.Bottom = lpBR.Y
rctClient.Left = Abs(rctFrame.Left)
rctClient.Top = Abs(rctFrame.Top)
rctClient.Right = rctClient.Right + Abs(rctFrame.Left)
rctClient.Bottom = rctClient.Bottom + Abs(rctFrame.Top)
rctFrame.Right = rctFrame.Right + Abs(rctFrame.Left)
rctFrame.Bottom = rctFrame.Bottom + Abs(rctFrame.Top)
rctFrame.Top = 0
rctFrame.Left = 0

hClient = CreateRectRgn(rctClient.Left, rctClient.Top, rctClient.Right, rctClient.Bottom)
hFrame = CreateRectRgn(rctFrame.Left, rctFrame.Top, rctFrame.Right, rctFrame.Bottom)

CombineRgn hFrame, hClient, hFrame, RGN_XOR

SetWindowRgn frm.hWnd, hFrame, True
End Sub

Private Sub Form_Click()
MakeTransparent Me
End Sub
是不是你要的效果？

Answer 2

Frame没有BackStyle属性

Answer 3

同意楼上的讲法。。。
你想实现怎么样的效果？