Monday, August 30, 2004

List all the virtual key codes

This code snippet describes how to list all the virtual key codes and use them to simulate keyboard events. (email:

Description: Here, on formcreate, the combobox is built up with all key names using the GetKeyNameText function. I have added the virtual key code in the combo text. Then on combobox's change, you can simulate your Keybd_Event.

procedure TForm1.FormCreate(Sender: TObject);
i, j: Word;
MyKey: LPARAM; //Just to be brave!
TmpStr: array[0..100] of char;
ComboBox1.Text := '';
for i := 0 to 255 do
MyKey := MapVirtualKey(i, 0); //if this is not done, we get
//actual keyboard scan code
MyKey := MyKey shl 16; //We need to shift it to left because the
// GetKeyNameText function expects it that way!
j := GetKeyNameText(MyKey, @TmpStr, 101);
if j > 0 then
ComboBox1.Items.Add(string(TmpStr) + Format(' %.3d', [i]));

procedure TForm1.ComboBox1Change(Sender: TObject);
VKey: Word;
VKey := StrToInt(Copy(ComboBox1.Text, length(ComboBox1.Text) - 1, 3));
Keybd_Event(VKey, 0, 0, 0);


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