OnComPostMessage Event

postComMessage	Copy Code
window.postComMessage(5); window.postComMessage(3.14); window.postComMessage("Hello World!"); window.postComMessage(new Date()); window.postComMessage(true); window.postComMessage(5, 3.14, "Hello World", new Date(), true);

In This Topic

Description

Fired when you execute in JavaScript the window.postComMessage(value) function in order to pass values from JavaScript to your application.

Syntax

Visual Basic
Public Event OnComPostMessage( _ ByRef Params As Variant _ )

Parameters

Params

An OLE/COM Variant returned from the JavaScript context by calling window.postComMessage function.

When you call window.postComMessage function you can pass arbitrary scalar JavaScript values which are converted to Strings (BSTR).

If you pass a single argument to window.postComMessage, the ActiveX calls InitVariantFromString and Params is an OLE/COM Variant of VT_BSTR.
If you pass multiple arguments to window.postComMessage, the ActiveX calls InitVariantFromStringArray and Params is an OLE/COM Variant of VT_ARRAY | BT_BSTR.

postComMessage	Copy Code
window.postComMessage(5); window.postComMessage(3.14); window.postComMessage("Hello World!"); window.postComMessage(new Date()); window.postComMessage(true); window.postComMessage(5, 3.14, "Hello World", new Date(), true);

postComMessage

Copy Code

window.postComMessage(5);
window.postComMessage(3.14);
window.postComMessage("Hello World!");
window.postComMessage(new Date());
window.postComMessage(true);
window.postComMessage(5, 3.14, "Hello World", new Date(), true);

Remarks

WebKitX implements a bi-directional mechanism for sending data from your application to JavaScript and from JavaScript to your application.

To sent data from your application to JavaScript you can use:

To send data from JavaScript to your application you can use:

window.postComMessage

Example

Example (HTML)
Example (Visual Basic)
Example (C#)

<html>
<head>

<script>	
	function notify(param)
	{
		window.postComMessage(param);
	}
</script>

</head>
<body>
	<br><br><button onclick="notify('Hello from WebKitX')">Post COM Message with String</button>
	<br><br><button onclick="notify(5)">Post COM Message with Integer</button>
	<br><br><button onclick="notify(3.1415)">Post COM Message with Double</button>
	<br><br><button onclick="notify(new Date())">Post COM Message with Date</button>
	<br><br><button onclick="notify(true)">Post COM Message with Boolean</button>
</body>
</html>

Private Sub WebKitX1_OnComPostMessage(Params As Variant)
    On Error Resume Next
    ' Message originated from window.postComMessage() in JavaScript
    AddLog "OnComPostMessage: " & Params
End Sub

private void WebKitXCEF31_OnComPostMessage(object sender, AxWebKitXCEF3Lib._DWebKitXCEF3Events_OnComPostMessageEvent e)
{
    AddLog("OnComPostMessage: " + e.@params);
}