saving export of a command into a variable

[Mohammad_Dos]

how to save export of a command into a variable?

[aGerman]

That's a bit unspecific. If "export" means "output" of a command then you could use a FOR /F loop to save a line or a part of a line into a variable. Generally:
for /f "your options here" %%i in ('your command line here') do set "variable=%%i"

That's also unspecific but it's the best I can answer. It depends on the command, its output and what part of it you want to save ...

Regards
aGerman

[Mohammad_Dos]

yes. that is true
i mean output
thank u so much

and sorry for my english