Defining Non-Scoped Text At Run-time C++ - c++

Question

Is there an option of defining a text and using it later not as a string or anything, just as a part of a function but being able to redefine it in the middle of the program (the definition to not take place in the preprocessor, but runtime)? For example I have the following code in C++ Windows Forms:
private: System::Void ps1_GotFocus(System::Object^ sender, System::EventArgs^ e)
{
if(this->ps1->Text == L"/ Your text here /") this->ps1->Text = L"";
this->ps1->ForeColor = System::Drawing::Color::FromName( "Black" );
}
private: System::Void ps2_GotFocus(System::Object^ sender, System::EventArgs^ e)
{
if(this->ps1->Text == L"/ Your text here /") this->ps1->Text = L"";
this->ps2->ForeColor = System::Drawing::Color::FromName( "Black" );
}
where ps1 and ps2 are TextBoxes and I'm using it to display a gray 'Your text here' string and when clicked in the TextBox ready for input (when the TB GotFocus) to clear the text and make the input black. Having in mind that I have 9 TextBoxes like that, is it possible to make all this with less code? I tried the same code with #define ps ps1 and a global ps_GetFocus() method outside everything that uses that ps, but as you know the #defines are done in the preprocessor and the last define (ps ps9) is defined even before the program is started.
Is there a way of defining non-scoped text at run-time?

Answer 1

Just have a common ps_GotFocus function for all your text boxes, and use sender (you'll have to cast it to the appropriate type first, not sure how to do that in .Net C++ with that weird ^ thingie, maybe dynamic_cast will work?) instead of the various ps objects.
Something along the lines of:
private: System::Void ps_GotFocus(System::Object^ sender, System::EventArgs^ e)
{
TypeForYourTextBox^ the_sender = dynamic_cast<TypeForYourTextBox^>(sender);
// I'm unsure about the previous line but you get the idea
// You may also want to check that the cast succeeded, ie. the_sender is not null
if (the_sender->Text == L"/ Your text here /") the_sender->Text = L"";
the_sender->ForeColor = System::Drawing::Color::FromName("Black");
}