trans_colour.bas

OCX DLL注册工具 OCX DLL注册工具

Attribute VB_Name = "Module4"
Option Explicit

Public Declare Function GetPixel Lib "Gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Public Declare Function SetWindowRgn Lib "user32" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long
Public Declare Function CreateRectRgn Lib "Gdi32" (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long) As Long
Public Declare Function CombineRgn Lib "Gdi32" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode As Long) As Long
Public Declare Function DeleteObject Lib "Gdi32" (ByVal hObject As Long) As Long
Dim CurRgn, TempRgn, RGN_DIFF, success As Long

Public Function AutoFormShape(bg As Form, transColor)

    Dim X, Y As Integer

    CurRgn = CreateRectRgn(0, 0, bg.ScaleWidth, bg.ScaleHeight)

    While Y <= 5

        While X <= bg.ScaleWidth
            If GetPixel(bg.hdc, X, Y) = transColor Then

                TempRgn = CreateRectRgn(X, Y, X + 1, Y + 1)

                success = CombineRgn(CurRgn, CurRgn, TempRgn, RGN_DIFF)

                DeleteObject (TempRgn)

            End If

            X = X + 1

        Wend

        Y = Y + 1

        X = 0

    Wend

    success = SetWindowRgn(bg.hWnd, CurRgn, True)

    DeleteObject (CurRgn)

End Function