Visual c++ (CLR) Acces richtextbox from a source file - visual-c++

Question

I have created a Form using c++ (CLR).
I have added a richtextbox and I need to make it visible in my source file in order to change the text from there.
So to sum it up:
I have a richtextbox in MyForm.h.I need to change the text of this richtextbox from Source.cpp.How do I do that?
Managed to fix it by doing so:
Creating a new function in the .cpp source file like this:
void TEST(System::Windows::Forms::RichTextBox ^ changin)
{
changin->Text = "TEST";
}
Than in the .h file
void TEST(System::Windows::Forms::RichTextBox ^ changin);
Here is when a button is pushed:
private: System::Void button4_Click(System::Object^ sender, System::EventArgs^ e) {
TEST(richTextBox4);
}
Where richTextBox4 is the one that should be modified from the .cpp file.

Answer 1

Pass your text through a public function in your form and there update the text.
In such way you save object encapsulation.
In your form add a method in the following manner:
In the form you have a private field:
private RichTextBox rtb;
rtb is reference to a user control containing the RichTextBox which expose the RichTextBox text property by overriding it:
public override string Text
{
get
{
return rtb.Text;
}
set
{
rtb.Text = value;
}
}
then by a public method in your form you can access the RichTextBox.
public void SetText()
{
rtb.Text = "test_text";
}
you can have a look on the same idea here:
http://www.codeproject.com/Articles/18178/A-Padded-Text-Box-Control
Update : have a look on the following example it emphasize my explanation above : http://www.codeproject.com/Articles/4544/Insert-Plain-Text-and-Images-into-RichTextBox-at-R
I hope it is clear enough.