How to get unity3d game exe window handle

i want to get game *.exe window handle.

i know i can getActiveHandle or enum all the desktop windows to find it.

but i wanna get it directlry by scripts. i get it in my u3d scripts . not by another exe. is any API or net function.

i want to like this:

Code (CSharp):

1. void Start()
2. {
3. IntPrt u3dGameWnd = /*...*/;
4. }

thanks very much.

 

who knows. moderator thanks

 

why dont you let him go!

 

Hey, @Tomas1856

Unity really needs a way to do this reliably that doesn't depend on the game window name, to avoid conflicts.

Multiplayer developers need a way to launch multiple copies of the game to different X,Y positions on the screen, and set their window titles uniquely so they can be possible thidentified. Sadly this isn't possible through the Unity API and if we need to implement this functionality ourselves we need the HWND to do so.

I'll submit a bug report for this as well.

Thanks

 

Alright, I managed to scrape together a working solution.

Code (CSharp):

1. [DllImport("user32.dll")]
2. static extern bool EnumThreadWindows(int dwThreadId, EnumThreadDelegate lpfn, IntPtr lParam);
3.  
4. [DllImport("Kernel32.dll")]
5. static extern int GetCurrentThreadId();
6.  
7. static IntPtr GetWindowHandle()
8. {
9.     IntPtr returnHwnd = IntPtr.Zero;
10.     var threadId = GetCurrentThreadId();
11.     EnumThreadWindows(threadId,
12.         (hWnd, lParam) => {
13.             if(returnHwnd == IntPtr.Zero) returnHwnd = hWnd;
14.             return true;
15.         }, IntPtr.Zero);
16.     return returnHwnd;
17. }

I can then use both of these functions I want to use:

Code (CSharp):

1. [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
2. public static extern IntPtr SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int Y, int cx, int cy, int wFlags);
3. [DllImport("user32.dll", EntryPoint = "SetWindowText")]
4. public static extern bool SetWindowText(System.IntPtr hwnd, System.String lpString);

For any questions on what parameters to pass to those functions, see microsoft's documentation on them.

Edit: User Bunny83 has a good note on using lambdas with yhese callbacks here: https://forum.unity.com/threads/how...-of-the-games-own-window.528444/#post-6798728

Basically: Lambdas in native callbacks will break with il2cpp

 

The issue is tracked and can be voted on here:

https://issuetracker.unity3d.com/is...t-mainwindowhandle-always-returns-0-on-builds

 

Hi @Tomas1856, I tried to use user32.dll on Mac OSX, but it failed. Because it is Microsoft's API. I searched a lot of information and couldn't find a way to do the same job on Mac. What should I do on Mac OSX? For example, change the name of the window;