jna - How to get list of List all child controls (Handles) of a given window by using java -

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i want child handles of parent window. can done in autoit script but, want in java , command unavailable in autoitx4java.jar. started create it, , took example of calculator:

public static hwnd getwindow( windef.hwnd hwnd, windef.dword ucmd)  {     user32 user32 = (user32) native.loadlibrary("user32", user32.class);     return user32.getwindow(hwnd, ucmd); }  public static void main(string[] args) {     windef.hwnd hwnd = user32.instance.findwindow("calcframe", "calculator");     windef.dword = new windef.dword(5);   // child 5     system.out.println("parent : " + hwnd);     windef.hwnd hwnd3 = getwindow ( hwnd , );     system.out.println("child " + hwnd3);     windef.dword b = new windef.dword(2);  // next 2     windef.hwnd hwnd2= getwindow ( hwnd3 , b );     system.out.println(hwnd2);     int x = 0;     while (hwnd2  != null ) {         x++;         system.out.println(hwnd2);         hwnd2= getwindow ( hwnd , b );         if (x>30)             break;     } }

this code not working , throwing errors.

output:

parent : native@0x180d78

child native@0x4400f8

null

does not find sibling controls.


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