Crash in wxDialog::Create()

Wiggers · Post by **Wiggers** » Wed Aug 23, 2006 3:34 pm

I'm extracting some code from a program that uses wxWidgets for UI and sockets and making a DLL for use by other MFC programs. I managed to get everything to compile, but it crashed somewhere in hash.cpp when wxDialog::Create() was called. I tried recompiling wxWidgets with
#define wxUSE_STL 1
#define WXWIN_COMPATIBILITY_2_4 0

Now it crashes in wxHashTableBase::DoGet() where 'this' is NULL.

Code: Select all

harness.exe!wxHashTableBase::DoGet(long key=67110, long hash=67110)  Line 882 + 0x16	
harness.exe!wxWinHashTable::Get(long key=67110)  Line 581 + 0x1
harness.exe!wxFindWinFromHandle(void * hWnd=0x00010626)  Line 3036
harness.exe!wxAssociateWinWithHandle(HWND__ * hWnd=0x00010626, wxWindow * win=0x0091bd98)  Line 3045 + 0x9
harness.exe!wxWindow::SubclassWin(void * hWnd=0x00010626)  Line 1035 + 0xd
harness.exe!wxTopLevelWindowMSW::CreateDialog(const void * dlgTemplate=0x014619d0, const wxString & title={...}, const wxPoint & pos={...}, const wxSize & size={...})  Line 427
harness.exe!wxTopLevelWindowMSW::Create(wxWindow * parent=0x00000000, int id=11007, const wxString & title={...}, const wxPoint & pos={...}, const wxSize & size={...}, long style=537395201, const wxString & name={...})  Line 515 + 0x18
harness.exe!wxDialog::Create(wxWindow * parent=0x00000000, int id=11007, const wxString & title={...}, const wxPoint & pos={...}, const wxSize & size={...}, long style=537395201, const wxString & name={...})  Line 187 + 0x24

I have a very simple harness that simply calls an exported function from the DLL that has some global instances of the classes from the original program. I'm OR-ing the original style with wxDIALOG_NO_PARENT. The original style was just wxCAPTION.

Any ideas please?

Mark

KevinHock · Post by **KevinHock** » Wed Aug 30, 2006 1:03 pm

It might help if you posted the code being used to create the Dialog, e.g. the dialog constructor or other relevant code.

Wiggers · Post by **Wiggers** » Wed Aug 30, 2006 4:15 pm

I gave up trying to get it to work after wasting nearly a week on it. I've dumped all the wxDialog stuff and replaced it with MFC. It seems wxDialogs don't like being in DLLs.

Mark

KevinHock · Post by **KevinHock** » Wed Aug 30, 2006 4:26 pm

Or maybe they don't like being invoked from MFC.

Anyway, I'm sorry to hear that it didn't work out.

Wiggers · Post by **Wiggers** » Wed Aug 30, 2006 4:30 pm

Actually I hadn't done anything with MFC until I dumped the wxWidgets stuff! The harness was just plain, ordinary C code.