Question

How to determine if OS is 64 bit or 32bit in PowerBuilder?

Is it possible to obtain it using GetEnvironment?

Answer 1

GetEnvironment can give some info regarding the cpu via its CPUType property, but it will only return the platform type (alpha, mips, pentium, …).

You can test some remarkable value from the environment that is defined only on a 64b platform, like ProgramFiles(x86) by using GetContextService / GetContextKeywords and setting the environment variable as the queried context keyword:

string ls_vals[], ls_val, ls_env = "ProgramFiles(x86)" /*name of the env variable to query*/
ContextKeyword lcxk_base

GetContextService("Keyword", lcxk_base)
lcxk_base.GetContextKeywords(ls_env, ls_vals[])
if upperbound(ls_vals[]) > 0 then
   ls_val = ls_vals[1]
else
   ls_val = "*undefined*" //it is 32b
end if

messagebox ("architecture", ls_val)

I would have advised at first to test for the PROCESSOR_ARCHITECTURE environment variable, that is AMD64 in the shell for a windows 64b, but it seems that a PB executable gets x86…