.NET C++. Creating an instance of Form

Question

Hi, I have tried to create a simple app with .NET C++ (I come from C#) but I failed just on the beginning. I have created winforms project and add Form2 to the project. The compiler keeps reporting that Form2 is not a member of my project. What I need to do in order to create an instance of that Form2? Thank you!

Answer 1

First of all make sure that your new form2 uses same name space that form1 and application main file uses.

Answer 2

I Created 1 form added a button added a second form added a #include on form1 for form2 and then created an instance of from2 then called show here is the code below.

   #pragma once
#include "Form2.h"

namespace App {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

    /// <summary>
    /// Summary for Form1
    ///
    /// WARNING: If you change the name of this class, you will need to change the
    ///          'Resource File Name' property for the managed resource compiler tool
    ///          associated with all .resx files this class depends on.  Otherwise,
    ///          the designers will not be able to interact properly with localized
    ///          resources associated with this form.
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
     Form1(void)
     {
      InitializeComponent();
      //
      //TODO: Add the constructor code here
      //
     }

    protected:
     /// <summary>
     /// Clean up any resources being used.
     /// </summary>
     ~Form1()
     {
      if (components)
      {
       delete components;
      }
     }
    private: System::Windows::Forms::Button^  button1;
    protected: 

    private:
     /// <summary>
     /// Required designer variable.
     /// </summary>
     System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
     /// <summary>
     /// Required method for Designer support - do not modify
     /// the contents of this method with the code editor.
     /// </summary>
     void InitializeComponent(void)
     {
      this->button1 = (gcnew System::Windows::Forms::Button());
      this->SuspendLayout();
      // 
      // button1
      // 
      this->button1->Location = System::Drawing::Point(46, 32);
      this->button1->Name = L"button1";
      this->button1->Size = System::Drawing::Size(75, 23);
      this->button1->TabIndex = 0;
      this->button1->Text = L"button1";
      this->button1->UseVisualStyleBackColor = true;
      this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
      // 
      // Form1
      // 
      this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
      this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
      this->ClientSize = System::Drawing::Size(284, 262);
      this->Controls->Add(this->button1);
      this->Name = L"Form1";
      this->Text = L"Form1";
      this->ResumeLayout(false);

     }
#pragma endregion
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
        Form2 ^ F = gcnew Form2();
        F->Show();
       }
    };
}