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custom dialogs / DialogBoxIndirect() / dialog template in memory problems hi there,
i have a problem with creating a custom dialog with a dialog template in memory. i have been working on this
for days, but now i am close to giving up. i just cannot see the mistake i seem to make. i hope you can help me.
i wrote a function called LRESULT ConflictDialog() that should create a dialog-window with two buttons. (actually it
should do much more, but i minimized the code to focus on the problem) i used the sample code from MSDN for
"Creating a Template in Memory" (Platform SDK->User Interface Services->Windowing->Dialog Boxes->Using Dialog Boxes)
but it just doesn't work. i always get the -1 error code which according to documentation means that the function
failed.
i really changed only a few details and watched out for allignment and stuff, but it only worked arbitrarily and now
i found a state where it never works. i also tried inserting the real values instead of the NULLs into the
line but it didn'tCode:ret = DialogBoxIndirect(NULL,(LPDLGTEMPLATE) hgbl,NULL,(DLGPROC) ConflictDialogProc);
change a thing.
i work with dev-cpp if that matters. you can download a 7kb-zip including the whole source-code from
www.torchous.de/thomas/conflictDialogTest.zip ...
the code of the ConflictDialog() function is as follows..:
the code of the ConflictDialogProc is as follows..:Code:LRESULT ConflictDialog() { HGLOBAL hgbl; LPDLGTEMPLATE uebergabeTemplate; LPDLGITEMTEMPLATE lpdit; LPWORD lpword; LPWSTR lpwsz; LRESULT ret; int nchar; // check for memory allocation errors hgbl = GlobalAlloc(GMEM_ZEROINIT, 1024); if (!hgbl) { mb("error@ConflictDialog :: GlobalAlloc failed!"); return -1; } uebergabeTemplate = (LPDLGTEMPLATE)GlobalLock(hgbl); // Define a dialog box. uebergabeTemplate->style = DS_CENTER| WS_POPUP | WS_BORDER | WS_SYSMENU | DS_MODALFRAME | WS_CAPTION; uebergabeTemplate->cdit = 2; // number of controls uebergabeTemplate->x = 100; uebergabeTemplate->y = 20; uebergabeTemplate->cx = 300; uebergabeTemplate->cy = 170; lpword = (LPWORD) (uebergabeTemplate + 1); *lpword++ = 0; // no menu *lpword++ = 0; // predefined dialog box class (by default) lpwsz = (LPWSTR) lpword; nchar = 1+ MultiByteToWideChar (CP_ACP, 0, "File Conflict\0", -1, lpwsz, 50); lpword += nchar; //----------------------- // Define a Ignore button. //----------------------- lpword = lpwAlign (lpword); lpdit = (LPDLGITEMTEMPLATE) lpword; lpdit->x = 130; lpdit->y = 150; lpdit->cx = 30; lpdit->cy = 15; lpdit->id = ID_IGNORE; lpdit->style = WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON; lpword = (LPWORD) (lpdit + 1); *lpword++ = 0xFFFF; *lpword++ = 0x0080; // button class atom lpwsz = (LPWSTR) lpword; nchar = 1+MultiByteToWideChar (CP_ACP, 0, "Ignore\0", -1, lpwsz, 50); lpword += nchar; lpword = lpwAlign (lpword); // align creation data on DWORD boundary *lpword++ = 0; // no creation data //----------------------- // Define a Ignore button. //----------------------- lpword = lpwAlign (lpword); lpdit = (LPDLGITEMTEMPLATE) lpword; lpdit->x = 260; lpdit->y = 50; lpdit->cx = 30; lpdit->cy = 12; lpdit->id = ID_SHOW1; // OK button identifier lpdit->style = WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON; lpword = (LPWORD) (lpdit + 1); *lpword++ = 0xFFFF; *lpword++ = 0x0080; // button class atom lpwsz = (LPWSTR) lpword; nchar = 1+MultiByteToWideChar (CP_ACP, 0, "show\0", -1, lpwsz, 50); lpword += nchar; lpword = lpwAlign (lpword); // align creation data on DWORD boundary *lpword++ = 0; // no creation data GlobalUnlock(hgbl); ret = DialogBoxIndirect(NULL,(LPDLGTEMPLATE) hgbl,NULL,(DLGPROC) ConflictDialogProc); // check for errors if( ret != ID_IGNORE && ret != ID_SHOW1 && ret != 0 && ret!=-1) mb("error in DialogBoxIndirect! unknow return code!"); if( ret == 0 ) mb("error in DialogBoxIndirect! returned 0!"); if( ret == -1 ) mb("error in DialogBoxIndirect! returned -1! so the dialog failed!"); GlobalFree(hgbl); return ret; }
and this is the lpwAlign function..:Code:BOOL CALLBACK ConflictDialogProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam) { switch (iMsg) { case WM_INITDIALOG : { HFONT hfont = (HFONT)GetStockObject(DEFAULT_GUI_FONT); SendDlgItemMessage(hDlg, ID_SHOW1, WM_SETFONT, (WPARAM)hfont, TRUE); SendDlgItemMessage(hDlg, ID_IGNORE, WM_SETFONT, (WPARAM)hfont, TRUE); return TRUE ; } case WM_COMMAND : switch (LOWORD (wParam)) { case ID_IGNORE : EndDialog (hDlg, ID_IGNORE) ; return TRUE ; case ID_SHOW1 : EndDialog (hDlg, ID_SHOW1) ; return TRUE ; } break ; } return FALSE ; }
every help would be incredibly appreciated!Code:LPWORD lpwAlign ( LPWORD lpIn) { ULONG ul; ul = (ULONG) lpIn; ul +=3; ul >>=2; ul <<=2; return (LPWORD) ul; }
