How to detect windows 32bit or 64 bit using NSIS script?

Question

I have written nsis script for java project.I have Batch file in my project.I have written batch file for commonly windows 32bit and 64 bit.After installing i have started batch file automatically using Exec command.Its woks fine in 32bit windows.but the same time this is not worked well in 64 bit.so i suspect that before installing i should check whether windows is 32 bit or 64 bit version.please share your views how to check?

Answer 1

For future lazy googlers - A small snippet:

Include this:

!include x64.nsh 

And use this if:

${If} ${RunningX64}     # 64 bit code ${Else}     # 32 bit code ${EndIf}        

Answer 2

Use the RunningX64 macro in the x64.nsh header:

!include LogicLib.nsh !include x64.nsh  Section ${If} ${RunningX64}     DetailPrint "64-bit Windows" ${Else}     DetailPrint "32-bit Windows" ${EndIf}   SectionEnd