//Get all windows..non visible also

#include <windows.h>
#include <stdio.h>

HWND hWnds[16365];
DWORD hWndsNo = 0;

BOOL CALLBACK EnumWinsProc(HWND hWnd, LPARAM lParam)
{
 hWnds[hWndsNo++] = hWnd;
 return(TRUE);
}

int main()
{
 char str[256];
 EnumWindows(EnumWinsProc, NULL);
 for (DWORD i = 0; i < hWndsNo; i++)
 {
  GetWindowText(hWnds[i], str, 255);
  printf("%s\r\n", str);
 }
 printf("\r\nThere are currently %d windows...", hWndsNo);
 return 0;
}