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checking VBASIC on the system before launch

I have prepared a program in VBASIC 5.0 and I want to distribute it worldwide on CD-ROM. Despite my written warning, I am not sure that the target PC has properly installed the VBASIC RUN TIME.
I want to  authomatically check the installation before launching my program and eventually executing the VBASIC setup before.

(Obviously I can't use a VB program because I've no runtime installed)

Solutions?
claudio
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Asked:
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1 Solution
 
heartAuthor Commented:
Edited text of question
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watyCommented:
You should use the Wise setup program or the installshield setup program. They both can install VB5 runtime and check if the possible installed runtime are newer or not that the one you want to install.
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heartAuthor Commented:
I want that the final user launch always the same program name and I don't want to loose time to load the setup installation only to known that the runtime is already on.

I have in maind somethings like autoexec.bat that could test the existence of valid runtime and launch the setup or my program (a little C program with no runtime, coudn't be?).

And all should be as fast as possible because my program itself is a little bit slow to come up!

Could be that I wasn't enougth clear, eh...  :-)
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watyCommented:
Once the runtime DLL are installed they should never be deleted.

You should create a list of the needed DLL for your application and write a little C application verifying the existance of those files.

short int ExistFile(szPrintFile)
char szPrintFile[];
{
   DIR *dirp;
   struct dirent *dp;

   dirp = opendir( szPressPrint );
   if readdir (dirp) == NULL
      return 0;
   else
      return 1;
 
   closedir(dirp);

}
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mark2150Commented:
DOS:

IF EXIST {filespec} {yourprogram}

Your program only fires if the {filespec} is found. Most VB5 can be launched inside a batch.

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heartAuthor Commented:
ciao,waty
it's your a very good idea but you made 29 do 30..  :-)
I don't known C language and I don't want to start learning it because I am in a hurry with my application's development.
Could you expand the little code you have provided?
A program that: checks for the existence of a particular .DLL ( I will choose it later), if DLL doesn't exists, it fires a windows program (Microsoft setup one's is good enought) could be very nice.

Thanks you

ps. if you give to me a little explanation to how compile end link to prepare an executable program you gain a 50 point increase eh. eh. eh....

ciao
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