windows - Display end-user message in case of an error in custom action in MSI with Wix -

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say, have following wix markup instructs msi installer call custom action included dll:

<customaction id="ca_setproperties_finalize"          property="ca_oninstallfinalize"             value="[installed],[reinstall],[upgradingproductcode],[remove]" />  <customaction id='ca_oninstallfinalize'         binarykey='cadll'          dllentry='msioninstallfinalize'           execute='deferred' impersonate='no' />  <installexecutesequence>   <custom action='ca_setproperties_finalize'            before='installfinalize'></custom>   <custom action='ca_oninstallfinalize'             after='ca_setproperties_finalize'></custom> </installexecutesequence>  <binary id='cadll' sourcefile='sources\ca-installer.dll' />

and dll has following c++ code custom action:

#pragma comment(linker, "/export:msioninstallfinalize=_msioninstallfinalize@4")  extern "c" uint __stdcall msioninstallfinalize(msihandle hinstall)  {     //do work     if(dowork(hinstall) == false)     {         //error, cannot continue!         return error_install_failure;     }      return error_success; }

what happens when dowork method fails, installation should not continue, return error_install_failure. issue in case installer quits , installation gui window goes away.

so curious, there way change wix markup able show user message in case custom action returns error?

i use create message boxes handle errors within dll:

pmsihandle hrecord = msicreaterecord(0); msirecordsetstring(hrecord, 0, text("enter text error!")); msiprocessmessage(hinstall, installmessage(installmessage_error + mb_ok), hrecord); return error_install_userexit;

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