Managed C++/CLI

Graphics ^g = this->pictureBox1->CreateGraphics();
g->DrawRectangle(gcnew Pen(Color::Black,3),*m_AreaRoi[i].AreaRect);
this->pictureBox1->Invalidate();

thenutz72 wrote:

Why did I have to that? I kept telling myself the dll was already referenced and I had the "windows.h" #include going on.

thenutz72 wrote:

The code is in a normal CLR project, .NET Form button_click (so it must be using User32.dll already, right?).

thenutz72 wrote:

It may have worked but did I do it 'right'?

Mark Salsbery
Microsoft MVP - Visual C++

deadlyabbas wrote:

PLease tell me that what is needed the first.

savitri wrote:

Why it is giving problem i am not understanding?

// LoginForm.h

ref class Form1;

public ref class Loginform : public System::Windows::Forms::Form
{
   // code goes here
}

// LoginForm.cpp

#include "form1.h"

void Loginform::SomeMethod()
{
   // you can access form1 methods here without any error
}

savitri wrote:

Please tell me any good books for vc.net and i want some samples of vc.Net

savitri wrote:

they wrote like this. partial class save: public xyz{ //code here}.

savitri wrote:

Like this how can i write in vc.net

savitri wrote:

is der another way to access one class into other class. Please help me out.

form1.h
#pragma once

#include "AboutApp.h"
#include "LoginForm.h"
#using <mscorlib.dll>

//#pragma comment( lib, "user32.lib" )

namespace NewMDIApp {
	
	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;
	using namespace System::Runtime::InteropServices;

	/// <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:
#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)
		{
			// Form1
			// 
			this->AccessibleRole = System::Windows::Forms::AccessibleRole::MenuBar;
			this->AllowDrop = true;
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->BackgroundImage = (cli::safe_cast<System::Drawing::Image^  >(resources->GetObject(L"$this.BackgroundImage")));
			this->BackgroundImageLayout = System::Windows::Forms::ImageLayout::Stretch;
			this->ClientSize = System::Drawing::Size(1017, 700);
			this->Controls->Add(this->statusBar1);
			this->Controls->Add(this->statusStrip1);
		}
#pragma endregion
public:
[DllImport("user32.dll",EntryPoint="GetKeyState")]
//static int GetKeyState (int keycode);
static int GetKeyState(int keyCode); 
[DllImport("user32.dll",EntryPoint="keybd_event")]
static void keybd_event(Byte bVk, Byte bScan, UInt16 dwFlags, int dwExtraInfo); 
//[import("user32.dll", ExactSpelling=true)];
//public: System::short GetKeyState(int keyCode); 
public:  static LoginForm^ lgFrm=gcnew LoginForm;

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
			 
			 this->UpdateKey();
			 AboutApp^ app=gcnew AboutApp(this);
			app->txtUsr->Text="Savitri";
		           app->Show();
		 }

AboutApp.h(Form2)
#pragma once
#using <mscorlib.dll>

namespace NewMDIApp {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;
	
	ref class Form1;
	public ref class AboutApp : public System::Windows::Forms::Form
	{
	
	public:
		AboutApp(Form1^ frm)
		{
			
			InitializeComponent();
			frm1=frm;
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
#pragma region Windows Form Designer generated code

		void InitializeComponent(void)
		{
			//Code goes here
		}
#pragma endregion
private: 
    System::Void textBox1_TextChanged();		  
public:
	Form1^ frm1;
	    			
private: System::Void btnLogin_Click(System::Object^  sender, System::EventArgs^  e) {
			 String ^username,^password;
			 username=txtUsr->Text->ToString();
			 password=txtPwd->Text->ToString();
			 MessageBox::Show(username);
			 MessageBox::Show(password);
			 if(username->Equals("Savitri") && password->Equals("Pramod"))
			 {
				 MessageBox::Show("SuccessFully Logged in");
				//if i used frm1->GetValues() function it will give error. like Form1 is undefined.
				 textBox1_TextChanged();
			 }
			 else
			 {
				 MessageBox::Show("Not valid UserName and Password");
			 }
		 }

AboutApp.Cpp
#include "StdAfx.h"
#include "AboutApp.h"
#include "Form1.h"
System::Void NewMDIApp::AboutApp::textBox1_TextChanged(){
	if(frm1 != nullptr)
	frm1->GetValues(txtUsr->Text,txtPwd->Text);
}