Call a form and return to that form. C++ Winforms

Question

I have 2 forms. form1 calls fmr2 normally. Before calling I give a Hide in form1. After finishing the tasks in form2, I want to close it and reopen form1. I'm not getting. If I put the include "frmPrincipal.h" in form2, it gives an error when calling form1.

Here's the code:

			Chama o form2

frmJogo^ Form2 = gcnew frmJogo();
Form2->ShowDialog();
this->Hide();

     Chamando o form1 de volta
frmPrincipal^ newform1 = gcnew frmPrincipal();
newform1->ShowDialog();
this->Hide();

Answer 1

Hi @José Carlos Souza,

Calling Form1's header file in Form2 is a bad practice and you should avoid it. Assume the following code is implemented with a button.

frmPrincipal^ newform1 = gcnew frmPrincipal();
newform1->ShowDialog();
this->Hide();

The correct way is to add a declaration of buttonclick event in Form2.h, and then implement it in Form2.cpp. Form2.h

 //Generate a click event after double-clicking the button  
//modify it to a function declaration  
 private:  

    System::Void button1_Click(System::Object ^ sender,  
                               System::EventArgs ^ e); 

Form2.cpp

#include "Form1.h"  
#include "Form2.h"  
using namespace System;  
using namespace System::ComponentModel;  
using namespace System::Collections;  
using namespace System::Windows::Forms;  
using namespace System::Data;  
using namespace System::Drawing;  
 System::Void Project50::Form2::button1_Click(System::Object ^ sender,  

                                System::EventArgs ^ e) {  
    Project50::Form1^ dlg = gcnew Project50::Form1();
    dlg->Show();
    this->Hide();
 }  

Best regards,

Elya

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Answer 2

Hi

Perfect. The solution worked. I would never get that. I'm learning C++ and I didn't know that .cpp could have code.

Many thanks again for the help.

Taveira