Visual Basic, coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx

coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx

Author	Message
dave #1 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx hi my application uses a listview. i wanted a predefined list element to appear in bold red when the list was displayed. in order to do this i started looking at subclassing - i found the following example. http://www.--*.com/ this is written by "Bryan Stafford of New Vision Software?" anyway - the example he provides works pretty well - i don`t fully understand the intrices of subclassing .. but i`ve modified the code to suit my purposes. however if i add an SSTAB control to the example codes form .. which consists of 3 tabs .. and then move the listview "lvCustomDraw" onto the second tab. running the code - the listview elements are no longer changed ... i suspected that the wrong handle was being passed to the subclassing .... g_addProcOld = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc) i tried lvCustomDraw.hWnd - but this made no difference. Can anyone explain to me what i`m doing wrong , what needs to be done.. many thanks in advance DAVE
Thu, 09 Dec 2004 00:49:50 GMT

Randy Birc #2 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx Bryan should see this message if you post it to the msnews.microsoft.com's public.winapi forum. -- Randy Birch MVP Visual Basic http://www.mvps.org/vbnet/ Please respond only to the newsgroups so all can benefit. Quote: > hi > my application uses a listview. i wanted a predefined list element to appear > in bold red when the list was displayed. > in order to do this i started looking at subclassing - i found the following > example. > http://www.mvps.org/vbvision/_samples/CustomDrawLV_Demo.zip > this is written by "Bryan Stafford of New Vision Software?" > anyway - the example he provides works pretty well - i don`t fully > understand the intrices of subclassing .. but i`ve modified the code to suit > my purposes. > however if i add an SSTAB control to the example codes form .. which > consists of 3 tabs .. and then move the listview "lvCustomDraw" onto the > second tab. > running the code - the listview elements are no longer changed ... > i suspected that the wrong handle was being passed to the subclassing .... > g_addProcOld = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc) > i tried lvCustomDraw.hWnd - but this made no difference. > Can anyone explain to me what i`m doing wrong , what needs to be done.. > many thanks in advance > DAVE
Thu, 09 Dec 2004 01:04:46 GMT

Doug Ros #3 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx Is there any subclassing of the form? Doing certain things (e.g. handling notification codes in WM_COMMAND) requires subclassing the parent of the control. If the example you modified subclasses the form instead of properly finding the parent window of the control, that may be the problem. If you put the control in a container (SSTab, frames, picture boxes, etc), the parent is no longer the form. If all that's being subclassed is the ListView, I'm not really sure what could be going wrong. If I dug into the code I might be able to figure it out, but I have no time to do that this weekend. Sorry... Quote: > however if i add an SSTAB control to the example codes form .. which > consists of 3 tabs .. and then move the listview "lvCustomDraw" onto the > second tab.
Thu, 09 Dec 2004 01:06:22 GMT

#4 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx
Wed, 18 Jun 1902 08:00:00 GMT

dave #5 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx In Form_Load, change: g_addProcOld = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc) to: g_addProcOld = SetWindowLong(SSTab1.hWnd, GWL_WNDPROC, AddressOf WindowProc) and.... in Form_Unload, change: Call SetWindowLong(hWnd, GWL_WNDPROC, g_addProcOld) to: Call SetWindowLong(SSTab1.hWnd, GWL_WNDPROC, g_addProcOld) Quote: > hi > my application uses a listview. i wanted a predefined list element to appear > in bold red when the list was displayed. > in order to do this i started looking at subclassing - i found the following > example. > http://www.mvps.org/vbvision/_samples/CustomDrawLV_Demo.zip > this is written by "Bryan Stafford of New Vision Software?" > anyway - the example he provides works pretty well - i don`t fully > understand the intrices of subclassing .. but i`ve modified the code to suit > my purposes. > however if i add an SSTAB control to the example codes form .. which > consists of 3 tabs .. and then move the listview "lvCustomDraw" onto the > second tab. > running the code - the listview elements are no longer changed ... > i suspected that the wrong handle was being passed to the subclassing .... > g_addProcOld = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc) > i tried lvCustomDraw.hWnd - but this made no difference. > Can anyone explain to me what i`m doing wrong , what needs to be done.. > many thanks in advance > DAVE
Thu, 09 Dec 2004 04:36:10 GMT

Doug Ros #6 / 6	coloured LISTVIEW elements using subclassing - doesn`t work when using tabctl32.ocx This is exactly what I was talking about... Quote: > In Form_Load, change: > g_addProcOld = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf WindowProc) > to: > g_addProcOld = SetWindowLong(SSTab1.hWnd, GWL_WNDPROC, AddressOf WindowProc) > and.... in Form_Unload, change: > Call SetWindowLong(hWnd, GWL_WNDPROC, g_addProcOld) > to: > Call SetWindowLong(SSTab1.hWnd, GWL_WNDPROC, g_addProcOld)
Sun, 12 Dec 2004 21:56:13 GMT

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