The information in this article applies to:
- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 5.0a
SUMMARY
When a Visual FoxPro executable is running, it appears on the Windows or
Windows NT 4.0 taskbar. This code provides a programmatic method of
removing the Visual FoxPro executable from the taskbar while it is
executing. This code emulates behavior similar to setting the ShowInTaskbar
property to false (.F.) in Visual Basic.
MORE INFORMATION
This code does not work with Single Document Interface forms (SDI) because
the mainhwnd() function gets the Windows handle (HWND) of the Visual FoxPro
desktop. SW_HIDE serves to hide the executable from both the taskbar and
the tasklist. However, the executable is not totally hidden from the
operating system. When running an executable created with Visual FoxPro
3.0b, the Close Program window in Windows 95 and the Processes tab of the
Windows NT 4.0 Task Manager both show the Vfp300.esl file. With a Visual
FoxPro 5.0x executable running under Windows NT 4.0 or Windows 95, the
executable's name appears in the Processes tab of the Windows NT Task
Manager or in the Close Program window.
- Create a project called Zhide and add a program named Zhide.prg.
- In Zhide.prg, add the following code:
DO FORM Zhide.scx
READ EVENTS
Zhide.prg should be marked as the main file of the project.
- Add a form named Zhide to the project. Place the following code in the
Load event of the form:
Declare Integer ShowWindow in Win32API Integer hWnd, Integer nCmdShow
SET LIBRARY TO c:\vfp3\foxtools.fll
* The name of the Visual FoxPro folder may vary between machines.
- Add a command button and place the following code in the Click event:
#DEFINE SW_HIDE 0
m.retval = ShowWindow(mainhwnd(), SW_HIDE)
- Add a timer control to the form with an interval set to 10000
millisecond. Place the following code in the Timer event and close
the form:
m.retval = MessageBox("Click OK to quit", 0 + 48 + 0)
#DEFINE SW_SHOW 5
m.retval = ShowWindow(mainhwnd(), SW_SHOW)
CLEAR EVENTS
ThisForm.Release
NOTE: This code is important. Without this code the window does
not reappear and you cannot quit the application.
- Build the executable and close Visual FoxPro. From Explorer, double-
click Zhide.exe and within 10 seconds click the command button. The form
should disappear from the taskbar and the tasklist. Check the tasklist
by pressing the CTRL+ALT+DEL keys. In Windows 95 the Close Program
window appears. In Windows NT 4.0 the Windows NT Security dialog box
appears. Click Task Manager and then click the Applications tab. The
Visual Foxpro executable is not listed in the Task Manager of the
operating systems.
- When the Messagebox appears, click OK to restore Visual Foxpro.
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