what, any, printable impression user form formed values given system.windows.forms.keyeventargs?

as workaround problem, i cruise i have hoop keydown events printable impression user indeed typed.

keydown fin me keyeventargs vigilant properities keycode, keydata, keyvalue, modifiers, alt, shift, control.

my initial try only cruise keycode ascii code, nonetheless keycode keyboard 46, generation ("."), i finish adult duplicate generation user forms mislay key. so, i know explanation inadequate.

(for those curious, problem i have possess combobox datagridview's control collection somehow characters i form don't furnish keypress textchanged combobox events. letters consolidate q, $, %....

this formula imitate problem. beget form app reinstate ctor code. run it, try typing minute q twin comboxes.

public biased category form1 : form
{
    combobox cmbingrid;
    combobox cmbnotingrid;
    datagridview grid;

    open form1()
    {
        initializecomponent();

        grid = new datagridview();

        cmbingrid = new combobox();
        cmbnotingrid = new combobox();

        cmbingrid.items.add("a");
        cmbingrid.items.add("b");
        cmbnotingrid.items.add("c");
        cmbnotingrid.items.add("d");

        this.controls.add(cmbnotingrid);
        this.controls.add(grid);
        grid.location = new point(0, 100);
        this.grid.controls.add(cmbingrid);
    }