SINGLEINSTANCE Attribute | singleInstance Property | Internet Development Index |
Sets or retrieves a value that indicates whether only one instance of the specified HTML Application (HTA) can run at a time.
Syntax
HTML <HTA:APPLICATION SINGLEINSTANCE = bOpen... > Scripting [ bOpen = ] HTA:APPLICATION.singleInstance
Possible Values
bOpen Boolean爐hat specifies one of the following values:
yes Only one instance of the specified application can run at a time. no Default. Multiple instances of the specified application can run at the same time. The property is read-only. The property has a default value of no.
Remarks
Note The singleInstance property is read-only; however, the SINGLEINSTANCE attribute can be used to set the initial value.When set to true, the singleInstance property checks the value of the applicationName property before launching an instance of the application. For this check to be valid, the applicationName property must have a unique value assigned to it. You can use the applicationName property to identify a single application, regardless of the URL used to access it.
Example
This example shows how to retrieve the singleInstance property.
<HTML> <HEAD> <HTA:APPLICATION ID="oHTA" APPLICATIONNAME="myApp" SINGLEINSTANCE="yes" > <SCRIPT> alert("singleInstance = " + oHTA.singleInstance); </SCRIPT> </HEAD> <BODY SCROLL="no"> </BODY> </HTML>This feature requires Microsoft® Internet Explorer 5 or later. Click the following icon to install the latest version. Then reload this page to view the sample.
Standards Information
There is no public standard that applies to this property.
Applies To
HTA:APPLICATION
See Also
Introduction to HTML Applications (HTAs)