Thank you very much for the sample code. I will try it.

>I would stick with a native implementation. ActiveX can have odd focus issues and the last thing you want is to have a splitter where focus is not setting or releasing properly.
>
>As Boris points out it's not very difficult to create a splitter in Fox code. I built a simple one for use in HTML Help Builder years ago using just MouseDown, MouseUp and MouseMove events.
>
>Here's the exported control class code:
>
>

>**************************************************
>*-- Class:        wwsplitter (c:\wwapps\wwhelp\wwhelp_ui.vcx)
>*-- ParentClass:  shape
>*-- BaseClass:    shape
>*-- Time Stamp:   04/17/15 10:21:02 AM
>*
>DEFINE CLASS wwsplitter AS shape
>
>
>	Height = 355
>	Width = 8
>	MousePointer = 9
>	BackColor = RGB(192,192,192)
>	FillColor = RGB(0,0,0)
>	BorderColor = RGB(192,192,192)
>	*-- Set when the splitter is moved. Gets set to SECONDS(). When this value is 0 the splitter is not moving
>	nsplittermove = 0
>	lverticalsplitter = .F.
>	*-- SECONDS() value saved when display was last updated. Uses the nDisplayRefresh property to determine how often to refresh.
>	nlastdisplayrefresh = 0
>	*-- Holds the SECONDS() value of the last refresh.
>	ndisplayrefresh = 0.5
>	Name = "wwsplitter"
>
>
>	*-- This method is called when the mouse is dragged, but only in timed intervals based on nRefreshDisplay.
>	PROCEDURE onrefreshdisplay
>		LPARAMETERS nButton,nShift, nXCoord, nYCoord
>	ENDPROC
>
>
>	PROCEDURE MouseMove
>		LPARAMETERS nButton, nShift, nXCoord, nYCoord
>
>		IF nButton=1 && and THISFORM.lSplitterMove <  Seconds() - .15
>		   IF THIS.nSplitterMove = 0
>		     THIS.ZOrder(0)
>		     THIS.OnStartMove()
>		   ENDIF
>		   
>		   THIS.BackColor=RGB(0,0,0)
>		   IF !THIS.lVerticalSplitter
>		      THIS.Left = nXCoord
>		   ELSE
>		      THIS.Top = nYCoord
>		   ENDIF
>		 
>		   lnSeconds = SECONDS()
>		   *** Now handle the refresh
>		   IF lnSeconds > THIS.nLastDisplayRefresh + THIS.nDisplayRefresh
>		      THIS.OnRefreshDisplay(nButton,nShift, nXCoord, nYCoord)
>		      THIS.nLastDisplayRefresh = lnSeconds
>		   ENDIF
>
>		   THIS.nSplitterMove = lnSeconds
>		ENDIF   
>	ENDPROC
>
>
>	PROCEDURE MouseUp
>		LPARAMETERS nButton, nShift, nXCoord, nYCoord
>
>		IF THIS.nSplitterMove # 0.00
>		      THIS.BackColor=THISFORM.BackColor
>		      THIS.nSplittermove=0.00
>		      THIS.OnRefreshDisplay(nButton,nShift, nXCoord, nYCoord)
>		      THIS.OnStopMove()
>		ENDIF      
>	ENDPROC
>
>
>	*-- Fires when the splitter was moved. This event fires only when the move operation completes
>	PROCEDURE onsplittermoved
>	ENDPROC
>
>
>	PROCEDURE onstartmove
>	ENDPROC
>
>
>	PROCEDURE onstopmove
>	ENDPROC
>
>
>ENDDEFINE
>*
>*-- EndDefine: wwsplitter
>**************************************************
>

>
>
>What I do is hide the two panes while the splitter is moving (you can show them but it can be choppy)
>
>So In OnStartMove:
>
>

>THISFORM.oViewer.visible = .F.
>THISFORM.oTree.Visible = .F.
>

>
>When done make them visible again AND refresh the page in OnStopMove:
>
>

>THISFORM.Resize()
>
>THISFORM.oTree.visible = .T.
>THISFORM.oViewer.Visible = .T.
>

>
>You can basically capture the end move operation. The form Refresh then resizes the panes:
>
>

>THIS.oSplitter.Height = THIS.Height - THIS.oStatus.Height 
>THIS.oTree.Width = THIS.oSplitter.left + 1
>THIS.oviewer.Left = THIS.oSplitter.Left + THIS.oSplitter.Width - 1
>
>THIS.oViewer.width = THIS.width - THIS.oViewer.Left + 2 
>THIS.oViewer.height = THIS.oSplitter.height -THIS.oViewer.Top 
>THIS.oTree.height = THIS.oSplitter.height - THIS.oTree.top - 1
>

>
>This is a super easy implementation and if you really wanted to you could add references to the two sections to resize and have the splitter do the resizing. For me this was a one off thing so I do the resizing as part of my form render code which is easy enough.
>
>Hope this helps,
>
>+++ Rick ---
>
>
>>>>Hi,
>>>>I am looking for some suggestions on how to implement a split-window form. Let me describe.
>>>>
>>>>The form should be divided into two, kind of like you can divide a grid with a SplitBar property. The left side of the screen will show the grid bound to a cursor. And the right side of the split form will show the selected record in a Detailed view (textboxes, combo, edit boxes, etc.).
>>>>
>>>>The trick that I need to figure out is that the user should be able to make the left side wider or narrower. So there has to be a vertical divider that user can “grab” with a mouse and slide left-right.
>>>>
>>>>I would appreciate any suggestions on how this can be implemented.
>>>>TIA
>>>
>>>Hm google will bring some results on VFP splitter.
>>>
>>>It's tricky. I can give you a brief explanation what I do
>>>
>>>I do a (transparent) shape as splitter.
>>>then you need tho have a hidden shape that covers the whole form
>>>then the thing is done via OLE drgadrop,
>>>OLEStartDrag will bring the cover topmost (zorder) while OLEDrag will put the cover in background
>>>The cover OLEDragOver will return coordinates while the splitter OEGiveFeedback does the refresh.
>>>
>>>Thats basically is what I do.
>>>
>>>This is ancient code ....
>>>
>>>
>>>Lutz
>>
>>Thank you. I will download the Active-x that Borislav referenced and see how it works. If not, I will start building it from scratch and take your input of how you done it.