My Borland C++ skills are a little rusty and I am working on a Borland C++ project.
I am working on some OnKeyPress code and want to know how I can prevent the character typed to be displayed if it doesn't meet my criteria. Considder the code below:

if (Key != 'E')
{
  Application->MessageBox("E is the only valid input", "Information",MB_OK | MB_ICONINFORMATION);
  // What do I put here to prevent the character typed to be displayed in the Edit box?
}

Thanks,
Einar

UPDATE:
5 minutes later I thought about this. Any objections?

if (Key != 'E')
{
  Application->MessageBox("E is the only valid input", "Information",MB_OK | MB_ICONINFORMATION);
  Key = NULL;
}