SendMessage(Edit1.Handle ,WM_KEYDOWN, 65, 0);Edit1.没有反映。怎么办？

Question

急用。

Answer 1

PostMessage(Edit1.Handle ,WM_KEYDOWN, 65, 0);

Answer 2

SendMessage(Edit1.Handle ,WM_CHAR, 65, 0);

Answer 3

PostMessage试过了不行。
------------------------------怎么可能 ?unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
begin
  PostMessage(Edit1.Handle ,WM_KEYDOWN, 65, 0);
end;end.

Answer 4

SendMessage() 要有消息处理过程而PostMessage() 只要发出去就可以