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?
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Use the RunningX64 macro in the x64.nsh header: