unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, TntForms, StdCtrls;const wm_user_MY = Wm_User+123 ;
const wm_AppName='[email protected]';type
  TTntForm1 = class(TTntForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  protected
    procedure CreateParams(var Params:TCreateParams);override;
  private
    { Private declarations }
  public
    procedure zMyMsg(var MSG:TMessage);message wm_user_My;
    { Public declarations }
  end;var
  TntForm1: TTntForm1;implementation{$R *.DFM}procedure TTntForm1.Button1Click(Sender: TObject);
var f:HWND;
begin
  f:=FindWindow(wm_AppName,nil);
  if f>0 then
    SendMessage(Application.Handle,wm_user_MY,0,0);
end;procedure TTntForm1.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  Params.WinClassName:=wm_AppName; //是不是赋这个值不对
end;procedure TTntForm1.zMyMsg(var MSG: TMessage);
begin
  showmessage('get');
end;end.
代码如上
如果窗体是 TForm 该代码正常
如果窗体是 TTntForm 该代码失效,因为 findWindow 找不到该窗体。
晕死 ...