Need Assistance With My GUI Fly-In Code

So, I've been working on a GUI Fly-In code that makes any GUI object fly from left to right and stop at a desired position. I thought it might spice up GUIs, because who doesn't love windows drifting about? You just designate the object (%obj), the X destination for the object, (%destPos), and the amount of time that elapses between each pixel movement (%speed). Here's the code:

function guiFlyIn(%Obj, %destPos, %speed)
{
    if(!$GFINextRun)
    {
    %Obj.position.X = -1 * %Obj.Extent.X;
    $GFINextRun = 1;
    error("First Run!");
    }
    

    error("GMFI - " @ %Obj SPC %DestPos SPC %Speed);

    if( !%Obj.Position.X = %DestPos )
    {
    $GIFINextRun = 1;
    %Obj.Position.X += 1;
    
    schedule(%speed, 0, "GuiFlyIn", %obj, %destPos, %speed);
    }
    else
    {
    %newPos = %Obj.Position.X;
    echo("Finished! GuiFlyIn - " @ %newPos);
    $GIFINextRun = 1;
    }

}

However, it doesn't seem to be responding quite well. It just won't budge the way it's supposed to. I adapted the code from this other thing I have:

function BlurbOpsGui::onWake(%this)
{
OptWin.Position.X = -352;
%InitPos = OptWin.position.X;
echo(%this @ "::onWake - " @ %initPos);
OptWinMoveToPos();
playSound(Prompt);
}

function OptWinMoveToPos()
{
    if( OptWin.position.X != 0 )
    {
    //echo("Move #" @ $num + 1);
    OptWin.Position.X += 1;
    schedule(1, 0, "OptWinMoveToPos");
    }
    else
    {
    %newPos = OptWin.Position.X;
    echo(%this @ "::moveToPos - " @ %newPos);
    }
}

function BlurbOpsGui::onSleep(%this)
{
OptWin.position.X = -352;
}

That works just great. Notice I'm not using any "for" statements. This is because I have no idea how to use them... so thus, I use the repeating function method. Now, if one of you could replace my function loop with a "for" statement, that would be terrific, but up until now, my method has worked just fine. Does anyone know what's the problem here? Thanks!