run your program
To run standalone executable prog .exe , enter run\ prog .

The system first loads prog .exe into memory, then reserves memory space for the support libraries called by prog .exe including \windows\xb.dll , then starts prog .exe .

prog .exe executes a few machine instructions then calls an initialization routine in \windows\xb.dll . \windows\xb.dll carries out basic startup initialization, then calls the entry function in prog .exe to run your program. Thereafter, \windows\xb.dll executes only to support your program.

Whenever your program calls internal, intrinsic, or library functions, code in \windows\xb.dll executes, then returns to your program.