How to declare a hidden Form in another Form in WinForm VS C++2010?

Question

1.00/5 (1 vote)

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Form1:

C++

#pragma once
#include "Form2.h"
namespace Show {
           private: System::Void button1_Click(System::Object^sender, System::EventArgs^  e)          
            {
              this->Hide();
              Form^frm2=gcnew Form2();
               frm2->Show();
			 }
	};
}

Now i want to show Form1 again when Form2 is closed:

C++

#pragma once
#include "Form1.h"
......
private: System::Void Form2_FormClosed(System::Object^  sender, System::Windows::Forms::FormClosedEventArgs^  e) {
			Form^frm1=gcnew Form1();
                        frm1->Show();
		 }
......

But it's not okay. The error is about the declaration. Warned is that Form1 not declared!

Could you guys tell me what's wrong?
Thank you all!

Posted 23-Aug-12 20:58pm

christmars

Updated 23-Aug-12 21:12pm

v2

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Comments

Sergey Alexandrovich Kryukov 24-Aug-12 15:40pm

OK, form is node declared... what kind of logic do you have when you say that it's related to "hidden"?!
There is no such thing as "declare a hidden". The question makes no sense at all. Show/Hide is run-time, not declaration.
Make sure your declaration is visible. Besides, the whole thing makes little sense. Why would you close one form and hide another one, with a local variable of new -- it won't be accessible beyond the declaration. If you did not understand it, it's beyond help; you first need to learn basics like variables/members/types and instances, etc....
--SA

christmars 27-Aug-12 1:47am

ok, firstly thank you so much. knowing it's not possible is already helpful. i am a beginner:). But i would try to code a variable like you mean.

Maciej Los 25-Aug-12 10:51am

Your logic:
1) start app (Form1)
2) when you click on the button1, you are hiding Form1 and you are showing Form2
3) on closing Form2, you want to show(unhide) Form1
Am i right?

christmars 27-Aug-12 1:41am

yes you got it.

Maciej Los 27-Aug-12 3:43am

Sergey's comment is very important and usefull for the future. Your code looks fine, but - in my opinion - the problem is in the declaration of Form1. Check the correct name of header file for the Form1. Maybe you've changed it. The caption, title of window (Form1) is not equal with its name.

christmars 28-Aug-12 1:45am

thanks! yep i've already changed that. But i think the only reason is that "declare a hidden" is actrually not possible. i would forget this "Hide()" and make a new way out.

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Maciej Los · Accepted Answer · 2012-08-26T21:56:00

Solution 1

Start here:
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.hide.aspx#Y0[^]
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.show.aspx[^]
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.visible.aspx[^]

Examples at: GOOGLE[^]

Posted 26-Aug-12 21:56pm

Maciej Los

Comments

Sergey Alexandrovich Kryukov 5-Sep-12 3:39am

Relevant references, a 5.
--SA

Maciej Los 5-Sep-12 3:53am

Thank you Sergey ;)