ASM Community

In my little delphi program, I use SendMessage(hEdit, WM_GETTEXTLENGTH, 0, 0) to get the length of the text in an edit windows. Then I use SendMessage(hEdit, WM_GETTEXT, txtLen, longint(aEditText)) to get all the text out and deal with these text.

It is easy in Delphi programming. But how can I code it in MASM? Because I do not know the length of the text before I fetch. How can I declare the variable?

How to handle such undefined length in MASM?

Thank you for your help.

From win32.hlp:

The HeapReAlloc function reallocates a block of memory from a heap. This function enables you to resize a memory block and change other memory block properties. The allocated memory is not movable.

LPVOID HeapReAlloc(



    HANDLE hHeap,	// handle to a heap block 

    DWORD dwFlags,	// heap reallocation flags 

    LPVOID lpMem,	// pointer to the memory to reallocate 

    DWORD dwBytes 	// number of bytes to reallocate 

   );

Memory reallocation is certainly not always successful if it's a non-movable block. But any memory allocation has a chance to fail under various circumstances. The most frequent being that there's no memory left to allocate. Virtual memory helps to get around this, but then you're limited by disk space.

You should always check for errors when you allocate memory.