How to Bring the Front Panel in Front of All Desktop Windows in LabVIEW? -User32.dll Method

Updated Apr 26, 2021

Reported In

Software

  • LabVIEW Professional
  • LabVIEW Base
  • LabVIEW Full

Operating System

  • Windows

Issue Details

I want to set my Front Panel window in front of all desktop windows. The Front Panel property IsFrontmost, which is showed in the image below, sets the Front Panel only in front of all LabVIEW windows. How can I bring the Front Panel in front of all desktop windows?
IsFrontmost.JPG

Solution

If you use the functions FindWindowA and SetForegroundWindow in the User32.dll located in C:\WINDOWS\system32, the Front Panel is set in front of all desktop windows. The attached vi is bringing up the desired Front Panel on top of all other application windows every three seconds.

  1. Download the attached VI
  2. Open the Block Diagram
  3. Observe the Call Library Function nodes , we are using this node to call the functions from the User32.dll
  4. We are using a Property Node to programatically return the name of the of the Front Panel
  5. We are using the Front Panels name as an input to the FindWindow function which returns a handle to the window of the Front Panel
  6. Based on this handle the SetForegroundWindow function can bring the window in front of all desktop windows
  7. Run the VI
  8. Open non-LabVIEW applications such as web browser,File Explorer, etc. Observe every 3 second the selected LabVIEW Front Panel pops up above any application

 

The Block Diagram of the attached VI: 

Bring Window Forward.jpg

Additional Information

IMPORTANT NOTE: In some systems users have reported the following glitch when using this method: the Front Panel is not popping up above all desktop window, only the icon is flashing on the taskbar. If you are experiencing this issue please navigate to this guide to achieve the same goal with a different, batch file method