How to check how much from heap and from stack my program is using?

Heap consumption , internally & externally ( programatically ) : You can use GetProcessMemory function : https://msdn.microsoft.com/en-us/library/ms683219.aspx

Heap consumption , externally & non programatically : You can use MS Technet`s VMMap : https://technet.microsoft.com/en-us/sysinternals/vmmap.aspx

Stack consumption , internally ( programatically ) : You can use Windows thread information block : https://stackoverflow.com/a/1747249/1996740

Stack consumption , externally & programatically : Here is a nice answer showing how you can access an external thread`s thread information block : https://stackoverflow.com/a/8751576/1996740