怎么设置MDI窗口的背景,并且可以拉伸和平铺!!

[blueheart9734]

如题!可以调用打开图片对话框,选择背景图片.

[射天狼]

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[射天狼]

'在主窗口中(frmMain),选择背景菜单
Private Sub mnuSelectGround_Click()
On Error GoTo Errhandle
Dim fName As String, sName As String, OfName As OPENFILENAME

OfName.lStructSize = Len(OfName)
OfName.hwndOwner = hwnd
OfName.hInstance = App.hInstance
OfName.lpstrFilter = "图片文件" & Chr(0) & "*.Bmp;*.jpg;*.jpeg;*.gif;*.ico"
OfName.lpstrFile = Space(255) & Chr(0)
OfName.nMaxFile = 256
OfName.lpstrFileTitle = Space(255) & Chr(0)
OfName.nMaxFileTitle = 256
OfName.lpstrTitle = "选择图片..."
OfName.flags = OFN_LONGNAMES + OFN_PATHMUSTEXIST + OFN_FILEMUSTEXIST + OFN_HIDEREADONLY

If GetOpenFileName(OfName) Then
Screen.MousePointer = 11
DoEvents

SaveSetting "OrientZiXun", "BackGround", "PathValue", OfName.lpstrFile
frmBack.SetBack
frmBack.Hide

Screen.MousePointer = 0
End If

Exit Sub
Errhandle:
Screen.MousePointer = 0
ErrView Err.Description
End Sub


'添加一个背景窗口:frmBack,在窗口里面定义一个公共的设置背景函数,里面放一个PictureBox控件,设置AUTOSIZE为TRUE
Public Sub SetBack()
On Error Resume Next
Dim i As Long, j As Long, ls_Path As String

ls_Path = GetSetting("OrientZiXun", "BackGround", "PathValue")
If Trim(ls_Path) <> "" Then
If Dir(ls_Path) <> "" Then
picBack.Picture = LoadPicture(ls_Path)
Else
picBack.Picture = LoadPicture(ls_Path)
End If
Else
picBack.Picture = imgDefault.Picture
End If

If frmMain.mnuLaShen.Checked Then'拉伸
Me.PaintPicture picBack.Picture, 0, 0, frmMain.Width, frmMain.Height - 1800
Else'平铺
For j = 0 To frmMain.ScaleHeight Step picBack.ScaleHeight
For i = 0 To frmMain.ScaleWidth Step picBack.ScaleWidth
Me.PaintPicture picBack.Picture, i, j
Next
Next
End If
' Me.Font.Name = "楷体_GB2312"
' Me.ForeColor = vbWhite
' Me.Font.Size = 24
' Me.FontBold = True
' Me.CurrentX = frmMain.ScaleWidth - 3300
' Me.CurrentY = frmMain.ScaleHeight - 2500
' Me.Print "咨询管理系统"
frmMain.Picture = Me.Image
frmBack.Tag = Val(frmBack.Tag) + 1
frmMain.BackColor = Val(frmBack.Tag)
End Sub



'在模块中
Public Type OPENFILENAME
lStructSize As Long
hwndOwner As Long
hInstance As Long
lpstrFilter As String
lpstrCustomFilter As String
nMaxCustFilter As Long
nFilterIndex As Long
lpstrFile As String
nMaxFile As Long
lpstrFileTitle As String
nMaxFileTitle As Long
lpstrInitialDir As String
lpstrTitle As String
flags As Long
nFileOffset As Integer
nFileExtension As Integer
lpstrDefExt As String
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type

'系统全局常量========================================================================
Public Const OFN_LONGNAMES = &H200000
Public Const OFN_PATHMUSTEXIST = &H800
Public Const OFN_FILEMUSTEXIST = &H1000
Public Const OFN_HIDEREADONLY = &H4
Public Const OFN_EXPLORER = &H80000
Public Const OFN_OVERWRITEPROMPT = &H2

Public Declare Function GetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long