How To Use RUNDLL32 to Debug Control Panel Applets

Article translations Article translations
Article ID: 166168 - View products that this article applies to.
This article was previously published under Q166168
Expand all | Collapse all


You can use the RUNDLL32 application that is provided with Windows NT and Windows 95 to debug Control Panel applets. Use the following debug settings (set by selecting Build/Settings in Visual C++ version 4.x, or by selecting Project/Settings in Visual C++ version 2.x and 5.0):
Executable For Debug Session: C:\winnt\system32\rundll32.exe
- or -
Working Directory:
Program Arguments: shell32.dll,Control_RunDLL [path and name of
                                               CPL file]
Remote Executable Path and File Name:
The two choices for "Executable For Debug Session" are for both Windows NT and Windows 95. You must type in the name "Control_RunDLL" exactly, and you must use the full path and name of the Control Panel applet (.CPL file). You do not have to provide information for "Working Directory" and "Remote Executable Path and File Name."


The technique described here is subject to change in future versions of Windows and is provided for debugging purposes only. If you want your application to launch control panel applications programmatically, you should use the Control.exe program.


For additional information, please see the following article in the Microsoft Knowledge Base:
135068 How to Start a Control Panel Applet in Windows 95


Article ID: 166168 - Last Review: July 15, 2004 - Revision: 2.2
  • Microsoft Visual C++ 2.0 Professional Edition
  • Microsoft Visual C++ 2.1
  • Microsoft Visual C++ 2.2
  • Microsoft Visual C++ 4.0 Standard Edition
  • Microsoft Visual C++ 4.1 Subscription
  • Microsoft Visual C++ 4.2 Enterprise Edition
  • Microsoft Visual C++ 5.0 Enterprise Edition
  • Microsoft Visual C++ 4.2 Professional Edition
  • Microsoft Visual C++ 5.0 Professional Edition
kbbug kbdebug kbhowto kbide KB166168
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

Give Feedback


Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from