Setting an env. var. from custom action step error...

[lecm]

Hi!

I'm building a custom step action. Is this step, I set a macro that I want to be set as an environment variable when calling external programs. So, what I'm doing is this in the custom action :

Set objMacroColl = objAppl.Macros(VisBuildSvr.MacroTypeEnum.vbldMacro Temporary)
objMacroColl.Add MY_VARIABLE, "the value of variable", , , True

Every thing is good except that when I call an external program, the program doesn't see the variable I set!

PS : I tried setting a variable from a "SetMacro" action and checked the "add to env. var. ..." and it worked!

Please, tell what's wrong!