Technical Reference Manual - InduSoft

Appendix: Built-in Scripting Language
ViewerPostMessage
Posts a Windows System Message to the specified project screen.
Function Group Execution Windows Embedded Thin Client
ViewerPostMessage Module Activity Asynchronous Supported Supported Supported
Note: This function cannot be used with Tasks or in the Global Procedures script.
Syntax
ViewerPostMessage( strScrTitle, numMessage, numwParam, numlParam, optNumID )
strScrTitle
numMessage
numwParam
numlParam
optNumID
The name of the screen to which the message will be posted.
The number of the Windows System Message to be posted.
A numeric value or tag; additional message-specific information, which is passed to wParam of
the Windows System Message.
A numeric value or tag; additional message-specific information, which is passed to lParam of
the Windows System Message.
The specific instance number of the screen. (The ID is assigned when the screen is opened with
the Open() function.) This is an optional parameter; the default ID is 0.
Returned value
This function returns no values.
Notes
This function emulates the PostMessage function in Microsoft Windows. For more information, including a
complete list of available Windows System Messages, please consult Microsoft Developers Network.
Examples
Tag Name
Expression
ViewerPostMessage( "main", 16, 3, 1, 10 )
// Sends message 16 to the "main" screen with ID 10.
WinExec
WinExec is a built-in scripting function that executes a Windows command as if it was entered at the
command prompt.
Function Group Execution Windows Embedded Thin Client
WinExec Module Activity Asynchronous Supported Supported (see notes) Supported
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