Form Berlubang Dengan Visual Basic 6.0 (Vb6)
Dalam mengolah form pada Visual Basic menjadi sebuah sistem tentunya dengan menambahkan beberapa komponen sebagai pendukung merupakan hal yang umum dilakukan oleh programmer baik itu menggunakan Visual Basic 6.0 (VB6), Foxpro, PHP dan masih banyak yang lainnya. Bisa dikatakan form merupakan dasar dalam peletakan beberapa komponen (TextBox, ListView, Label, CommandButton, dll) yang kita perlukan dalam pengolahan data.
Pada kesempatan kali ini admin akan mengembangkan sebuah source code mengolah sebuah form menjadi berlubang dan transparan ibarat layout dibawah ini :
Form Berlubang dengan Visual Basic 6.0 (VB6)
Buka Ms. Visual Basic 6.0 (VB6) buat sebuah project dan form kemudian copas coding berikut ini pada prosedur (General) (Declarations)
Private Declare Function CreateRoundRectRgn Lib “gdi32” (ByVal X1 As Long, ByVal Y1 As Long, ByVal X2 As Long, ByVal Y2 As Long, ByVal X3 As Long, ByVal Y3 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 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 bRedraw As Long) As Long
Kemudian dilanjutkan copas coding Visual Basic 6.0 berikut sebagai function untuk membuat area transparan pada form
Private Function fMakeATranspArea(AreaType As String, pCordinate() As Long) As Boolean
Const RGN_DIFF = 4
Dim lOriginalForm As Long
Dim ltheHole As Long
Dim lNewForm As Long
Dim lFwidth As Single
Dim lFHeight As Single
Dim lborder_width As Single
Dim ltitle_height As Single
On Error GoTo Trap
lFwidth = ScaleX(Width, vbTwips, vbPixels)
lFHeight = ScaleY(Height, vbTwips, vbPixels)
lOriginalForm = CreateRectRgn(0, 0, lFwidth, lFHeight)
lborder_width = (lFHeight – ScaleWidth) / 2
ltitle_height = lFHeight – lborder_width – ScaleHeight
Select Case AreaType
Case “Elliptic”
ltheHole = CreateEllipticRgn(pCordinate(1), pCordinate(2), _
pCordinate(3), pCordinate(4))
Case “RectAngle”
ltheHole = CreateRectRgn(pCordinate(1), _
pCordinate(2), pCordinate(3), pCordinate(4))
Case “RoundRect”
ltheHole = CreateRoundRectRgn(pCordinate(1), _
pCordinate(2), pCordinate(3), pCordinate(4), _
pCordinate(5), pCordinate(6))
Case “Circle”
ltheHole = CreateRoundRectRgn(pCordinate(1), _
pCordinate(2), pCordinate(3), pCordinate(4), _
pCordinate(3), pCordinate(4))
Case Else
MsgBox “Unknown Shape!!”
Exit Function
End Select
lNewForm = CreateRectRgn(0, 0, 0, 0)
CombineRgn lNewForm, lOriginalForm, _
ltheHole, RGN_DIFF
SetWindowRgn hWnd, lNewForm, True
Me.Refresh
fMakeATranspArea = True
Exit Function
Trap:
MsgBox “error Occurred. Error # ” & Err.Number & “, ” & Err.Description
End Function
Untuk yang terakhir copas coding Visual Basic 6.0 dibawah ini pilih prosedur Form_Load
Dim lParam(1 To 6) As Long
lParam(1) = 100
lParam(2) = 100
lParam(3) = 250
lParam(4) = 250
lParam(5) = 50
lParam(6) = 50
Call fMakeATranspArea(“RoundRect”, lParam())
Setelah selesai sekarang coba RUN / F5, form yang run akan berlubang transparan, ibarat layout tampilan gambar form diaawal pembahasan artikel ini. Bagi yang ingin mendownload admin persilahkan untuk mengklik link download diatas dan supaya bermanfaat.
