在onkeypress中写 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;
char(VK_RETURN), char(VK_LEFT), char(VK_UP), char(VK_RIGHT), char(VK_DOWN)]) then
key := #0;
begin
if not (key in ['0'..'9']) then key:=chr(0);
end;
begin
if not (key in ['0'..'9',#8]) then key:=#0
end;
backspace应能使用,好像是#8