procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9','.']) then
if Key <> #8 then
Key := #0;
end;
begin
if not (Key in ['0'..'9','.']) then
if Key <> #8 then
Key := #0;
end;
if (key < '0') or (key > '9') then begin
key := #0;
end;
begin
if not (key in ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', char(VK_BACK),
char(VK_RETURN), char(VK_LEFT), char(VK_UP), char(VK_RIGHT), char(VK_DOWN)]) then
key := #0;
end;
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
IF NOT (KEY IN ['0'..'9','.']) THEN KEY:=#0;
end;
if (key<#48) or (key>#56) and (key<>8) and (key<>#46) then
key:=#0;
begin
if not (Key in ['.',#8,'0','1','2','3','4','5','6','7','8','9']) then
Key := #0;
end;