vb.net - Check if Adobe Reader is installed before using it -


i want able have app check if adobe reader installed. if is, want program use display pdf, if not want use free (limited) reader control display pdf.

any suggestions

edit: question seems little broad basicly i'm trying following

try    dim acrodisplay new axacropdflib.axacropdf     acrodisplay.left = 50    acrodisplay.top = 50    acrodisplay.width = 200    acrodisplay.height = 500    me.controls.add(acrodisplay)    msgbox("acro added") catch ex exception    msgbox("acro not installed")    ''load alternate pdf viewer (spire.pdf free) end try

however when acrobat isn't installed instead of going catch statement shows error "could not load assembly" , exits sub

what want if acrobat control isn't installed, wont display , error , instead load alternate pdf viewer

is there way check axacropdflib.axacropdf before attempting load?

hopefully makes things clearer

edit 2: after searching , screwing around found 2 possible ways might able both can't find how in vb.net

first axacropdflib.axacropdf in available namespaces found c# example don't know how change vb.net c# - how check if namespace, class or method exists in c#??

second add unhandled exception handler found few examples none seem work

any chance direct me working example either (or both) of these options

manged fin working solution, doesn't work how thinking doe work fine

i used following code

    dim adobesoftwares microsoft.win32.registrykey = microsoft.win32.registry.localmachine.opensubkey("software").opensubkey("adobe")     if adobesoftwares nothing         'messagebox.show("no adobe software")         dim pdfdisplay new pdfiumviewer.pdfviewer          pdfcontrol = "pdfium"     else         if not array.indexof(adobesoftwares.getsubkeynames, "acrobat reader") = -1             'messagebox.show("adobe reader installed")             dim pdfdisplay new axacropdflib.axacropdf             pdfcontrol = "acrobat"         else             'messagebox.show("adobe reader not installed")             dim pdfdisplay new pdfiumviewer.pdfviewer             pdfcontrol = "pdfium"         end if     end if

then in display code see "pdfcontrol" in use , run relevant code display in display

so if adobe reader installed, i'll using control, , if isn't i'll using free (but less featured) control display pdf files if else looking @ doing similar me can


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