procedure TfmBaseBill.BillStrKeyPress(Sender: TObject; var Key: Char);
begin
if Key in [#39, '`', '[', ']'] then
Key := #0;
end;
procedure ControlInputInt(var Key: Char; bPlus: Boolean=True);
begin
if bPlus then
begin
if not (Key in ['0'..'9', #13, #8]) then
Key := #0;
end else
begin
if not (Key in ['0'..'9', '-', #13, #8]) then
Key := #0;
end;
end;
if key = #13 then
begin
key := #0;
selectnext(ActiveControl, true, true);
end;
ControlInputInt(Key, FIsPlus);
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