prghwnd (PHWND) - output
Array of window handles. The array must contain (idLast - idFirst + 1) elements. The handle of a window, whose identity is WID (in the range idFirst to idLast), has a zero-based index in the array of (WID - idFirst). If there is no window for a window identity within the range, the corresponding element in the array is NULLHANDLE.