c# - Application sometimes crashes when opening a dialog on only one machine -

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so kind of weird error. on 1 machine 1 of our customers (windows xp sp3) our program crashes when trying open filter dialog via showdialog().

what happens: user works expected he/she nothing unnormal or wrong , he/she is/was tested on several machines (ranging win xp 32 bit win 7 64 bit).

now, after time he/she want's use filter dialog (which he/she did @ point dozen times) , application crashes. wonderful "$applicationname caused problem , has terminated" message windows xp, beneath can see filter dialog, partially build (meaning: can see window, scroll bar , transparent 'holes' text controls/labels should be.

in windows eventviewer can see entry

event id: 1000 source: .net runtime 4.0 error re (maybe stands behind , says 'reporting'?!)

faulting application $applicationname.exe, version $versionnumber, stamp $somerandomnumbers, faulting module ntdll.dll, version 5.1.2600.6055, stamp 4d00f27b, debug?0, fault address 0x00446da

now, weirds me out: position dialog opened via showdialog, embedded in 2(!) try...catch blocks. how possible application crash? there aren't logfileentries (something done in every catch block we've in program , it's first thing do) crash.

i uninstalled application , .net 4 machine, rebooted installed again, installed windows updates , rebooted again. same result.

*edit noticed something: when close message microsoft, additional entry in eventviewer created:

the process terminated due unhandled exception i guess that's meaning in english, since original message in language had translate

exceptioncode: c015000f, address 7c9546da address same

as @hans said, it's caused incorrect use of de/activateactctx winapi functions.

i met same problem when write vb app. using activex contrl(mfc). place dialog variant in control class definition. below:

cmydlg dlg;

so when dialog initilized not in control. , made same issue you. when control should displayed, error appears.


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