Shoutbox

js code:

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// variables
var SF_RTF = 0x2;
var SF_UNICODE = 0x10;
var WM_USER = 0x400;
var EM_STREAMOUT = (WM_USER + 74);

// did this just to make sure that function call smaller
var nFlags = SF_RTF | SF_UNICODE;

/*
// this was my testing
MsgPlus.CreateWnd('WndMain.xml', 'WndMain');
Debug.DebuggingWindowVisible = true;*/

function OnWndMainEvent_CtrlClicked(PlusWnd, ControlId) {
    // check which control is sending the event
    if (ControlId == 'BtnSend') {
        // create a variable to hold the handle of the rtf control
        var CodeBox_hWnd = PlusWnd.GetControlHandle('CodeBox');
        // print this handle to verify for later use
        Debug.Trace('CodeBox Handle: '+CodeBox_hWnd);
        // create our memory block for the EDITSTREAMCALLBACK
        var EDITSTREAMCALLBACK = Interop.Allocate(12);
            /* specify the application defined variable (simply to verify
               the rtf box is the one the function is relating to) */
            EDITSTREAMCALLBACK.WriteDWORD(0, CodeBox_hWnd);
            // get the callback pointer for our function
            EDITSTREAMCALLBACK.WriteDWORD(8, Interop.GetCallbackPtr('EditStreamCallback'));
        // send the message to the control
        // notice the use of Call not Call2; Call is for functions that return an INT, Call2 is to return a BSTR - http://mpscripts.net/docs/ref-interop-call2.php
        Interop.Call('user32', 'SendMessageW', CodeBox_hWnd, EM_STREAMOUT, nFlags, EDITSTREAMCALLBACK.DataPtr);
    }
}

function EditStreamCallback(dwCookie, lpBuff, cb, pcb) {
    // dwCookie should match the CodeBox control handle
    Debug.Trace ('dwCookie: '+dwCookie);
    // print the length of the raw rtf data
    Debug.Trace ('cb: '+cb);
    // define a datablock large enough to hold our data
    var lpsz = Interop.Allocate(cb+1);
    // copy the memory from the data buffer to our allocated memory block
    Interop.Call('kernel32', 'RtlMoveMemory', lpsz, lpBuff, lpsz.Size);
    // print out the result
    Debug.Trace(lpsz.ReadString(0, false));
}

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