### Set the Stack Size

You can set the stack size in one of two ways:

1. Specify the /B"/STACK:reserve[,commit]" compiler option.
   Specify the /B"/STACK:reserve compiler option.
2. Specify the /STACK: reserve[,commit] linker option on the linker command line.
   Specify the /STACK: reserve] linker option on the linker command line.

Specify the STACKSIZE statement in a module definition (.DEF) file for the first thread of an application; use the _beginthread function call for threads created later. By default, the linker reserves 32K of stack space for the first thread.

By default, the linker reserves 1 MB of stack space and commits (physically allocates) 1 page.

Setting the stack size using one of the options listed above overrides the default value. For example, specifying the linker option

       /STACK:65536

sets the stack size to be 64K. Because the 16-bit stack is allocated from the 32-bit stack, you must ensure that the 32-bit stack is large enough for both your 32-bit and 16-bit code.

Stack Allocation
Stack Probes
Module Definition Files