怎么设置子窗体和父窗体。我设置的怎么老出错。
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Buttons;type
TForm1 = class(TForm)
BitBtn1: TBitBtn;
procedure BitBtn1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementationuses Unit2;{$R *.dfm}procedure TForm1.BitBtn1Click(Sender: TObject);
begin
form2.Show;
end;procedure TForm1.FormCreate(Sender: TObject);
beginend;end.
unit Unit2;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;type
TForm2 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}procedure TForm2.FormCreate(Sender: TObject);
beginend;end.
unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Buttons;type
TForm1 = class(TForm)
BitBtn1: TBitBtn;
procedure BitBtn1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementationuses Unit2;{$R *.dfm}procedure TForm1.BitBtn1Click(Sender: TObject);
begin
form2.Show;
end;procedure TForm1.FormCreate(Sender: TObject);
beginend;end.
unit Unit2;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;type
TForm2 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form2: TForm2;implementation{$R *.dfm}procedure TForm2.FormCreate(Sender: TObject);
beginend;end.
然后在窗口1的
procedure TForm1.BitBtn1Click(Sender: TObject);
begin
try
if not assigned(form2) then
begin
form2=TForm2.create(nil);
form2.showmodel;
end;
finally
freeandnil(form2)
end;
end;