[RESOLVED] What is the diffrence between these two code samples?

[Crash893]

Example given ( works fine)

private void listBox1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            // make sure they're actually dropping files (not text or anything else)
            if( e.Data.GetDataPresent(DataFormats.FileDrop, false) == true )
                // allow them to continue
                // (without this, the cursor stays a "NO" symbol
                e.Effect = DragDropEffects.All;
        }

And my code for a CrystalReports viewer
I know the code doesnt do anythine persay but it wont even trigger the event thats what im wondering

private void crystalReportViewer1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            // make sure they're actually dropping files (not text or anything else)
            if (e.Data.GetDataPresent(DataFormats.FileDrop, false) == true)
                // allow them to continue
                // (without this, the cursor stays a "NO" symbol
                e.Effect = DragDropEffects.All;
        }