Fenster-Effekte Die nachfolgenden Prozeduren zeigen ein paar nette Effekte zum Einblenden (Implode) und Ausblenden (Explode) von Fenstern.
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Die nachfolgenden Prozeduren zeigen ein paar nette Effekte zum Einblenden (Implode) und Ausblenden (Explode) von Fenstern.

' Zunächst alle benötigten API-Funktionen
Private Type RECT
  Left As Long
  Top As Long
  Right As Long
  Bottom As Long
End Type
 
Private Declare Function GetWindowRect Lib "user32" ( _
  ByVal hwnd As Long, _
  lpRect As RECT) As Long
Private Declare Function GetDC Lib "user32" ( _
  ByVal hwnd As Long) As Long
Private Declare Function ReleaseDC Lib "user32" ( _
  ByVal hwnd As Long, _
  ByVal hdc As Long) As Long
Private Declare Function SetBkColor Lib "gdi32" ( _
  ByVal hdc As Long, _
  ByVal crColor As Long) As Long
Private Declare Function Rectangle Lib "gdi32" ( _
  ByVal hdc As Long, _
  ByVal X1 As Long, _
  ByVal Y1 As Long, _
  ByVal X2 As Long, _
  ByVal Y2 As Long) As Long
Private Declare Function CreateSolidBrush Lib "gdi32" ( _
  ByVal crColor As Long) As Long
Private Declare Function SelectObject Lib "user32" ( _
  ByVal hdc As Long, _
  ByVal hObject As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" ( _
  ByVal hObject As Long) As Long
 
' Ausblenden-Effekt
Public Sub ExplodeForm(f As Form, Speed As Integer)
  Dim R As RECT
  Dim fWidth As Integer
  Dim fHeight As Integer
  Dim i As Integer
  Dim x As Integer
  Dim y As Integer
  Dim cx As Integer
  Dim cy As Integer
  Dim Desktop As Long
  Dim Brush As Long
 
  GetWindowRect f.hwnd, R
  fWidth = (R.Right - R.Left)
  fHeight = R.Bottom - R.Top
  Desktop = GetDC(0)
  Brush = CreateSolidBrush(f.BackColor)
  For i = 1 To Speed
    cx = fWidth * (i / Speed)
    cy = fHeight * (i / Speed)
    x = R.Left + (fWidth - Cx) / 2
    y = R.Top + (fHeight - Cy) / 2
    Rectangle Desktop, x, y, x + cx, y + cy
  Next i
  x = ReleaseDC(0, Desktop)
  DeleteObject (Brush)
End Sub
 
' Einblenden-Effekt
Public Sub ImplodeForm(f As Form, Speed As Integer)
  Dim R As RECT
  Dim fWidth As Integer
  Dim fHeight As Integer
  Dim i As Integer
  Dim x As Integer
  Dim y As Integer
  Dim cx As Integer
  Dim cy As Integer
  Dim Desktop As Long
  Dim Brush As Long
 
  GetWindowRect f.hwnd, R
  fWidth = (R.Right - R.Left)
  fHeight = R.Bottom - R.Top
  Desktop = GetDC(0)
  Brush = CreateSolidBrush(f.BackColor)
  For i = Speed To 1 Step -1
    cx = fWidth * (i / Speed)
    cy = fHeight * (i / Speed)
    x = R.Left + (fWidth - Cx) / 2
    y = R.Top + (fHeight - Cy) / 2
    Rectangle Desktop, x, y, x + cx, y + cy
  Next i
  x = ReleaseDC(0, Desktop)
  DeleteObject (Brush)
End Sub

Beispiel:

Private Sub Form_QueryUnload()
  ImplodeForm Me, 500
End Sub
 
Private Sub Form_Unload()
  ExplodeForm Me, 500
  End
End Sub