This function retrieves information about the first heap allocated by a specified process.
TRUE indicates that the first entry of the heap list has been copied to the buffer. FALSE indicates failure. The ERROR_NO_MORE_FILES error value, returned by GetLastError, indicates that no heap list exists or the snapshot does not contain heap list information.
The calling application must set the dwSize member of HEAPLIST32 to the size, in bytes, of the structure. Heap32ListFirst changes dwSize to the number of bytes written to the structure. This number is never greater than the initial value of dwSize, but it can be smaller. If the value is smaller, do not rely on the values of members whose offsets are greater than this value. To retrieve information about other heaps in the heap list, use the Heap32ListNext function.