PRIVATE Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) 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
Sub SetPicture()
picCopy.Visible = True
If picCopy.Width <= Picture1.ScaleWidth Then
picCopy.Left = (Picture1.ScaleWidth - picCopy.Width) / 2
Else
picCopy.Left = 0
HScroll1.Min = 0
HScroll1.Value = 0
HScroll1.Max = picCopy.Width - Picture1.ScaleWidth
HScroll1.SmallChange = HScroll1.Max / 100
HScroll1.LargeChange = HScroll1.Max / 10
End If
If picCopy.Height <= Picture1.ScaleHeight Then
picCopy.Top = (Picture1.ScaleHeight - picCopy.Height) / 2
Else
picCopy.Top = 0
VScroll1.Min = 0
VScroll1.Value = 0
VScroll1.Max = picCopy.Height - Picture1.ScaleHeight
VScroll1.SmallChange = VScroll1.Max / 100
VScroll1.LargeChange = VScroll1.Max / 10
End If
End Sub
Private Sub Form_Resize()
On Error Resume Next
Picture1.Width = Me.ScaleWidth - VScroll1.Width
Picture1.Height = Me.ScaleHeight - HScroll1.Height
VScroll1.Left = Picture1.Width
HScroll1.Top = Picture1.Height
VScroll1.Height = Picture1.Height
HScroll1.Width = Picture1.Width
SetPicture
End Sub
Private Sub HScroll1_Change()
picCopy.Left = -HScroll1.Value
End Sub
Private Sub mCopyScreen_Click() '抓屏
Dim hDC As Long, sx As Integer, sy As Integer
Private Sub mSaveFile_Click() '将文件保存为BMP
On Error Resume Next
With CommonDialog1
.DialogTitle = "储存文件"
.Filter = "位图文件(*.bmp)|*.bmp"
.CancelError = True
.ShowOpen
If Err.Number <> cdlCancel Then
SavePicture picCopy.Picture, .FileName
End If
End With
End Sub
Private Sub VScroll1_Change()
picCopy.Top = -VScroll1.Value
End Sub