ارجو منكم المساعدة العجلة لاخوكم فى الاسلام
عند البحث فى هذا المنتدى العظيم وجدت كود جميل وهو مثال لاداة صعبة جدا وهى treeview ولكن لم افهم اى جملة فى هذا الكود ارجو منكم شرح هذا لكود ولكم جزيل الشكر
Option Explicit
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 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 bRedraw As Long) As Long
Public Sub TransparentForm(frm As Form)
frm.ScaleMode = vbPixels
Const RGN_DIFF = 4
Const RGN_OR = 2
Dim outer_rgn As Long
Dim inner_rgn As Long
Dim wid As Single
Dim hgt As Single
Dim border_width As Single
Dim title_height As Single
Dim ctl_left As Single
Dim ctl_top As Single
Dim ctl_right As Single
Dim ctl_bottom As Single
Dim control_rgn As Long
Dim combined_rgn As Long
Dim ctl As Control
If frm.WindowState = vbMinimized Then Exit Sub
wid = frm.ScaleX(frm.Width, vbTwips, vbPixels)
hgt = frm.ScaleY(frm.Height, vbTwips, vbPixels)
outer_rgn = CreateRectRgn(0, 0, wid, hgt)
border_width = (wid - frm.ScaleWidth) / 2
title_height = hgt - border_width - frm.ScaleHeight
inner_rgn = CreateRectRgn(border_width, title_height, wid - border_width, hgt - border_width)
combined_rgn = CreateRectRgn(0, 0, 0, 0)
CombineRgn combined_rgn, outer_rgn, inner_rgn, RGN_DIFF
For Each ctl In frm.Controls
If ctl.Container Is frm Then
ctl_left = frm.ScaleX(ctl.Left, frm.ScaleMode, vbPixels) _
+ border_width
ctl_top = frm.ScaleX(ctl.Top, frm.ScaleMode, vbPixels) + title_height
ctl_right = frm.ScaleX(ctl.Width, frm.ScaleMode, vbPixels) + ctl_left
ctl_bottom = frm.ScaleX(ctl.Height, frm.ScaleMode, vbPixels) + ctl_top
control_rgn = CreateRectRgn(ctl_left, ctl_top, ctl_right, ctl_bottom)
CombineRgn combined_rgn, combined_rgn, control_rgn, RGN_OR
End If
Next ctl
SetWindowRgn frm.hWnd, combined_rgn, True
End Sub
Private Sub Form_Resize()
TransparentForm Me
End Sub