Hi:I'm using VB6 and am trying to compensate for the scrollbar max of 32767. Here's what I'm trying to do. I have a picture control within a picture control. Let's call the outside picture control picContainer and the picture control within it picChild. It's set up so that at design time if I move picContainer, picChild also moves. My form is being used to view images and picChild is what contains the images. When an image is loaded, picChild is resized to the size of the picture. When picChild is larger than picContainer, picContainer contains a vertical scrollbar so that I can move picChild up and down to see the image (I'm just worrying about the vertical right now, forget about the horizontal). I set my scrollbar (called fsb, for flat scroll bar) settings as follows:fsb.Max = picChild.Height - picContainer.Heightfsb.SmallChange = Abs(fsb1.Max \ 16) + 1fsb.LargeChange = Abs(fsb1.Max \ 4) + 1 The program works perfectly except for when (picChild.Height - picContainer.Height) > 32767, the largest value the scrollbar max property can handle. Attempting to set the max beyond that value of course causes an error to be generated.Any ideas as to how to compensate for this max of 32767 so that I can still scroll to see the entire picture? My goal is to be able to scroll up and down to see the entire picture but not scroll beyond the picture dimensions (I don't want the bottom of the picture scrolling up passed the top of the screen).Looking forward to your replies.Thanks.ksm What you can do is leave your scrollbar min at 0 and the max at 100. Then you can use the current value of the scrollbar to compute the percentage of how far up/down the inner picturebox control should be moved.Here is an example. Create a new project and a TextBox, CommandButton, HorizontalScrollBar, VerticalScrollBar, PictureBox and a Windows Common Dialog Control. Draw an additional PictureBox inside the first PictureBox. Position the TextBox and CommandButton next to each other across the top of your form. Make the first PictureBox take up the rest of the form. The second PictureBox, HorizontalScrollBar and the VerticalScrollBar will be positioned at runtime via code.Regards,Idle_MindOption ExplicitPrivate horzMax As SinglePrivate vertMax As SinglePrivate Sub Form_Load() Text1.Locked = True Text1.Text = "" Command1.Caption = "Select Image" With Picture2 .Move 0, 0 .AutoSize = True .Width = Picture1.Width .Height = Picture1.Height End With With HScroll1 .Top = Picture1.Top + Picture1.Height .Left = Picture1.Left .Width = Picture1.Width .Min = 0 .Max = 100 .SmallChange = 4 .LargeChange = 10 End With With VScroll1 .Top = Picture1.Top .Left = Picture1.Left + Picture1.Width .Height = Picture1.Height .Min = 0 .Max = 100 .SmallChange = 4 .LargeChange = 10 End WithEnd SubPrivate Sub Command1_Click() On Error GoTo cancelled CommonDialog1.CancelError = True CommonDialog1.DialogTitle = "Select an Image to View" CommonDialog1.Filter = "Image Files (*.jpg;*.bmp;*.gif)|*.jpg;*.bmp;*.gif|JPG Files (*.jpg)|*.jpg|BMP Files (*.bmp)|*.bmp|GIF Files (*.gif)|*.gif" CommonDialog1.ShowOpen Text1.Text = CommonDialog1.fileName Call loadImage(CommonDialog1.fileName)cancelled:End SubPrivate Sub loadImage(ByVal fileName As String) On Error Resume Next If Dir(fileName) <> "" Then With Picture2 .Move 0, 0 .Picture = LoadPicture(fileName) End With horzMax = Picture2.Width - Picture1.Width With HScroll1 .Value = 0 If horzMax < 0 Then .Max = 0 .Visible = False ' Optional Else .Max = 100 .Visible = True ' Optional End If End With vertMax = Picture2.Height - Picture1.Height With VScroll1 .Value = 0 If vertMax < 0 Then .Max = 0 .Visible = False ' Optional Else .Max = 100 .Visible = True ' Optional End If End With End IfEnd SubPrivate Sub HScroll1_Change() If HScroll1.Max > 0 Then Picture2.Left = -(HScroll1.Value / HScroll1.Max) * horzMax End IfEnd SubPrivate Sub VScroll1_Change() If VScroll1.Max > 0 Then Picture2.Top = -(VScroll1.Value / VScroll1.Max) * vertMax End IfEnd Sub
评论