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retrieve Winamp version in NSIS installer script

4 posts

henryt#

retrieve Winamp version in NSIS installer script

I use the great NSIS installer system to pack my plug-in. With the new 2.9x Winamp and some new API calls it cannot be used with older Winamp installations (<2.90). So I need to prevent the installation on older WA versions.

Question: Is there a way to retrieve the currently installed Winamp version with the NSIS installer?

I was searching the winamp.ini and the registry for an entry but without success. Any ideas?

Thanks!
kichik#
You can use GetDLLVersion to get the version of Winamp.exe and compare that to the minimum version that you need.
henryt#
Great, thank you!

It's a bit tricky to get a readable output but I found something in the NSIS forums.

Finally I used the following script:
  GetDLLVersion "$INSTDIR\winamp.exe" $R0 $R1

  IfErrors error 

   IntOp $R2 $R0 / 0x00010000 ; $R2 now contains major version 

   IntOp $R3 $R0 & 0x0000FFFF ; $R3 now contains minor version 

   IntOp $R4 $R1 / 0x00010000 ; $R4 now contains release 

   IntOp $R5 $R1 & 0x0000FFFF ; $R5 now contains build 

   StrCpy $0 "$R2.$R3.$R4.$R5" ; $0 now contains full version number 

   MessageBox MB_OK "Version: $0"

   Abort

  error:

  MessageBox MB_OK "There was an error"