DataGrid Scroll

[James]

I need to use the keyboard to scroll up/down my dtagrid.

I need to map the

1. up/down arrow keys to move up/down one recored at a time
2. Page Up/Down keys to move up/down one page at a time
3. CTRL+End and CTRL+Home keys to move to end and beginning(last
record and first record) of the datagrid respectively

code for page down:

public bool PreFilterMessage(ref Message m)
{

Keys keyCode = (Keys)(int)m.WParam & Keys.KeyCode;

if(m.Msg == WM_KEYDOWN && keyCode == Keys.PageDown)
{
int position = 500;

PostMessage (this.dataGrid1.Handle,WM_VSCROLL ,SB_THUMBPOSITION +
0x10000 * position,0);

return true;
}

Nothing is happening, does any one have any sample code to handle the
above mentioned events(1,2,3).

Thanks