GetProcessHeap PROC   (MS-Windows)

   Gets a handle to the heap of the calling process.
   Use this handle with HeapAlloc, HeapReAlloc, HeapFree, and HeapSize.
   Call GetLastError to get extended error information.

GetProcessHeap PROTO, ; get the current process heap handle

Returns: (HANDLE) EAX = Handle to the calling process's heap,
                        NULL if the function fails.

Note: GetProcessHeap allows you to allocate memory from the process heap without invoking HeapCreate first (by invoking HeapAlloc).

Example:     .data
             hHeapProc    DWORD ?
             dwBytes      DWORD 1000 ;bytes to allocate
             hHeapBlock   DWORD ?

             .code
             INVOKE GetProcessHeap
             mov hHeapProc,eax   ;save handle to process heap

             INVOKE HeapAlloc,
                    hHeapProc,   ;handle to process heap
                    0,
                    dwBytes
             mov hHeapBlock,eax  ;save handle to allocated block from heap