For a script that I have been working on, I have it display a toast. How do I set it up so that when you click on this toast, it will open the contact list?

code:

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// First, define a callback function for the toast click.
function OnToastClick(pParam){
    // In this function, we will show the contact list.
    // To do this, we will tell the tray icon listener window that it has been double clicked.
    // First we need a handle to the tray listener window.
    var hListener = Interop.Call('User32', 'FindWindowW', 'MSNHiddenWindowClass', 0);
    if(hListener){ // Check if the window was found.
        Interop.Call('User32', 'SendMessageW', hListener, 0xC350, 0, 0x203); // Tell the listener that it was clicked.
    }
}

// Now, all we need to do is create a toast with this callback function.
function ShowToast(){
    MsgPlus.DisplayToast('Example', 'Click here!', null, 'OnToastClick', null);
}

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Thanks

The above code is not polygamy safe. This means that you will get in trouble if you have more than one Messenger client open. To make it polygamy safe/compatible:

code:

---

// First, define a callback function for the toast click.
function OnToastClick() {
    // In this function, we will show the contact list (POLYGAMY SAFE).
    // To do this, we will tell the tray icon listener window that it has been double clicked.
    var hWnd = 0;
    var tIDCurrent = Interop.Call('Kernel32', 'GetCurrentThreadId');
    while (hWnd = Interop.Call('User32', 'FindWindowExW', 0, hWnd, 'MSNHiddenWindowClass', 0)) {
        if (Interop.Call('User32', 'GetWindowThreadProcessId', hWnd, 0) === tIDCurrent) {
            // If the hidden window was found, tell it we double clicked the tray icon
            Interop.Call('User32', 'SendMessageW', hWnd, /* REGISTERED MSG */ 0xC350, 0, /* WM_LBUTTONDBLCLK */ 0x203);
            break;
        }
    }
    /*
        // Another method is to use the MSNMSGRBlObj class instead:
        var hWnd = 0;
        var tIDCurrent = Interop.Call('Kernel32', 'GetCurrentThreadId');
        while (hWnd = Interop.Call('User32', 'FindWindowExW', 0, hWnd, 'MSNMSGRBlObj', 0)) {
            if (Interop.Call('User32', 'GetWindowThreadProcessId', hWnd, 0) === tIDCurrent) {
                Interop.Call('User32', 'SendMessageA', hWnd, 0x42A, 0, 0);
                break;
            }
        }
    */
}

// Now, all we need to do is create a toast with this callback function.
function ShowToast() {
    MsgPlus.DisplayToast('Example', 'Click here!', null, 'OnToastClick', null);
}

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Ok, thanks Cookie, may have had issue later on down the road. I am only using this for a script I made to display a random lyric in my personal message, and it also displays a toast with the lyric, so not a huge deal, but I guess you never know.