How to hand over the results of enumwindowsproc to a struct

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C++

Hello !

I have a problem when enumerating all visible windows.
My calback function which is "doing the job" is shown below.
As you can see I am writing every caption i find together with its handle into a struct defined in handlestruct.h.

This works just fine when I call
EnumWindows(EnumVisiWindowTitles, NULL);
from a main which is stored in the same file.

BUT: I want to call EnumWindows(EnumVisiWindowTitles, NULL) from a main which is located in a different cpp in the project.
Depending on where I define MYHANDLES lumpi[10] it's known in the main OR in the callback function.
So my question is: I would like to call EnumWindows(EnumVisiWindowTitles, NULL) and hand over a pointer to lumpi[0]. But I dont know how to it over because it is no LPARAM... I've tried to typecast but with no sucess. Does anyone have any ideas? :doh:

Tahnk you for any help!

#include "handlestruct.h"
MYHANDLES lumpi[10];

using namespace std;
	
 BOOL CALLBACK EnumVisiWindowTitles(HWND hWnd, LPARAM lparam) 
{		
	TCHAR String[200];	
		
	if (!hWnd)
		return TRUE;// Not a window, return TRUE to Enumwindows in order to get the next handle
	if (!::IsWindowVisible(hWnd))
		return TRUE;// Not visible, return TRUE to Enumwindows in order to get the next handle	
	if (!SendMessageW(hWnd, WM_GETTEXT, sizeof(String), (LPARAM)String))
		return TRUE;// No window title, return TRUE to Enumwindows in order to get the next handle
		lumpi[lumpi[0].count].haendchen = hWnd;
		
			for (int n=0; n<201; n++)//copy the caption to lumpi struct
				{
					lumpi[lumpi[0].count].title[n] = String[n];
				}
			
			lumpi[0].count++;		//Increase counter
			wcout<<String<<'\n';
			return true;			//return true to get next handle			
}