ActiveX Controls Overview

ActiveX controls (.ocx files) are installed by default when you install Visual FoxPro. You can distribute ActiveX controls with your applications. ActiveX controls are added to a form in an application by using the Visual FoxPro OLE container control.

The following table lists the .ocx files that are installed with Visual FoxPro and the ActiveX controls contained in each file.

Note:
Help files for these ActiveX controls are available when MSDN is installed.

File	Controls
MSCOMCt2.ocx	Animation control DateTimePicker control FlatScrollBar control MonthView control UpDown control
MCI32.ocx	Multimedia MCI control
MSChrt20.ocx	MsChart control
MSCOMCtl.ocx	ImageCombo control ImageList control ListView control ProgressBar control Slider control StatusBar control TabStrip control Toolbar control TreeView control
MSCOMM32.ocx	MSComm control
MSInet.ocx	Microsoft Internet Transfer control
MSMapi32.ocx	MAPIMessages control MAPISession control
MSMask32.ocx	Masked Edit control
MSWinsck.ocx	Winsock control
Picclp32.ocx	PictureClip control
Richtx32.ocx	RichTextBox control
Sysinfo.ocx	SysInfo control

Note:
In earlier versions of Visual FoxPro, the file containing the ActiveX controls was renamed from Comctl32.ocx to MSCOMCtl.ocx. Even though Visual FoxPro upgraded to the MSCOMCtl.ocx file, older forms with these controls still reference the older file because the ActiveX control is bound by its OleClass property. ActiveX controls from the older COMCtl32.ocx file have a version of 1. For example, the OleClass property for a ListView control on an earlier form would say:

Note:

In earlier versions of Visual FoxPro, the file containing the ActiveX controls was renamed from Comctl32.ocx to MSCOMCtl.ocx. Even though Visual FoxPro upgraded to the MSCOMCtl.ocx file, older forms with these controls still reference the older file because the ActiveX control is bound by its OleClass property. ActiveX controls from the older COMCtl32.ocx file have a version of 1. For example, the OleClass property for a ListView control on an earlier form would say:

В	Copy Code
COMCTL.ListViewCtrl.1

Newer ActiveX controls in the Mscomctl.ocx file have a version 2 (or higher). For example:

В	Copy Code
COMCTL.TreeViewCtrl.2

Visual FoxPro does not automatically upgrade your control, so it is important to know which version of an ActiveX control a form uses when distributing your applications.

See Also

Other Resources