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make WPF window on top of an external app window, but not topmost of every window

How to keep a window in front of another applications windowBring a window to the front in WPFGet the topmost window of my own application ONLY - in CEnsuring WPF window is on top all the time even when user clicks another maximised applicationGDI rendering to WPF windowHow to get the hWnd of Window instance?TopMost window going behind non-TopMost fullscreen window sometimesWPF windows is hidden when call win32WPF Window Activate Not Capturing FocusDisable Windows 8 CharmsBar in WPF-Fullscreen AppWpf application child window weird behaviour

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2

I need to extend an external Windows application with a fake toolbar. I can't modify that external application at all.

My fake toolbar app is an WPF app, with WPF MainWindow, C#.

This toolbar should appear on top of external app window, but not as system wide topmost.

I can get external app window HWND, size, rect and so with proper Win32 API functions or with WindowInteropHelper.

I may be able to hide my app window if it is not 100% visible by WindowFromPoint Win32 API call, but this is not the best idea.

Any idea how I should solve this?

I tried with SetWindowPos WIN32 API fuction but no success.

SetWindowPos(myapp_hwnd, externalapp_hwnd, 0, 0, 0, 0, 0x0002);

Solution is to call SetWindowPos twice as mentioned here:
How to keep a window in front of another applications window

SetWindowPos(myapp_hwnd, 0, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);

SetWindowPos(myapp_hwnd, GetNextWindow(extapp_hwnd, GW_HWNDPREV), 0, 0, 0, 0, 
 SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE);

c# .net wpf winapi

share|improve this question

edited Mar 24 at 3:23

hkhk

asked Mar 23 at 10:43

hkhkhkhk

316

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  at this moment my best idea is to see if my app window 4 corners are visible by WindowFromPoint and hide my app window if it is not.
  
  – hkhk
  Mar 23 at 10:52
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  stackoverflow.com/a/52920807/7571258
  
  – zett42
  Mar 23 at 20:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi zett42, thanks for your help, that's what I need. I need to call SetWindowPos twice to get the correct result.
  
  – hkhk
  Mar 24 at 1:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The way to make one window always be above another in the zorder is to use window ownership
  
  – David Heffernan
  Mar 24 at 8:18
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidHeffernan Not a good idea when the windows belong to two different processes, as in OPs case.
  
  – zett42
  Mar 24 at 19:57
  

  
  
  
  

 | 
show 1 more comment

2

I need to extend an external Windows application with a fake toolbar. I can't modify that external application at all.

My fake toolbar app is an WPF app, with WPF MainWindow, C#.

This toolbar should appear on top of external app window, but not as system wide topmost.

I can get external app window HWND, size, rect and so with proper Win32 API functions or with WindowInteropHelper.

I may be able to hide my app window if it is not 100% visible by WindowFromPoint Win32 API call, but this is not the best idea.

Any idea how I should solve this?

I tried with SetWindowPos WIN32 API fuction but no success.

SetWindowPos(myapp_hwnd, externalapp_hwnd, 0, 0, 0, 0, 0x0002);

Solution is to call SetWindowPos twice as mentioned here:
How to keep a window in front of another applications window

SetWindowPos(myapp_hwnd, 0, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);

SetWindowPos(myapp_hwnd, GetNextWindow(extapp_hwnd, GW_HWNDPREV), 0, 0, 0, 0, 
 SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE);

c# .net wpf winapi

share|improve this question

edited Mar 24 at 3:23

hkhk

asked Mar 23 at 10:43

hkhkhkhk

316

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  at this moment my best idea is to see if my app window 4 corners are visible by WindowFromPoint and hide my app window if it is not.
  
  – hkhk
  Mar 23 at 10:52
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  stackoverflow.com/a/52920807/7571258
  
  – zett42
  Mar 23 at 20:15
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi zett42, thanks for your help, that's what I need. I need to call SetWindowPos twice to get the correct result.
  
  – hkhk
  Mar 24 at 1:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The way to make one window always be above another in the zorder is to use window ownership
  
  – David Heffernan
  Mar 24 at 8:18
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @DavidHeffernan Not a good idea when the windows belong to two different processes, as in OPs case.
  
  – zett42
  Mar 24 at 19:57
  

  
  
  
  

 | 
show 1 more comment

I need to extend an external Windows application with a fake toolbar. I can't modify that external application at all.

My fake toolbar app is an WPF app, with WPF MainWindow, C#.

This toolbar should appear on top of external app window, but not as system wide topmost.

I can get external app window HWND, size, rect and so with proper Win32 API functions or with WindowInteropHelper.

I may be able to hide my app window if it is not 100% visible by WindowFromPoint Win32 API call, but this is not the best idea.

Any idea how I should solve this?

I tried with SetWindowPos WIN32 API fuction but no success.

SetWindowPos(myapp_hwnd, externalapp_hwnd, 0, 0, 0, 0, 0x0002);

Solution is to call SetWindowPos twice as mentioned here:
How to keep a window in front of another applications window

SetWindowPos(myapp_hwnd, 0, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);

SetWindowPos(myapp_hwnd, GetNextWindow(extapp_hwnd, GW_HWNDPREV), 0, 0, 0, 0, 
 SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE);

c# .net wpf winapi

share|improve this question

edited Mar 24 at 3:23

hkhk

asked Mar 23 at 10:43

hkhkhkhk

316

SetWindowPos(myapp_hwnd, 0, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER);

SetWindowPos(myapp_hwnd, GetNextWindow(extapp_hwnd, GW_HWNDPREV), 0, 0, 0, 0, 
 SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE);

share|improve this question

edited Mar 24 at 3:23

hkhk

asked Mar 23 at 10:43

hkhkhkhk

316

share|improve this question

edited Mar 24 at 3:23

hkhk

asked Mar 23 at 10:43

hkhkhkhk

316

asked Mar 23 at 10:43

hkhkhkhk

316

asked Mar 23 at 10:43

hkhkhkhk

316