Open a form / ->ShowDialog problems. RRS feed

  • Question

  • Hi.

    I am trying to learn C++/CLR but it seems very tricky compared to things I have done in the past.

    I wish to open a second form when I click a button, it should be simple but just refuses to work.

    From the MSDN:
    Code Snippet

    void ShowMyDialogBox()
       Form2^ testDialog = gcnew Form2;
       // Show testDialog as a modal dialog and determine if DialogResult = OK.
       if ( testDialog->ShowDialog( this ) == ::DialogResult::OK )
          // etc etc etc.

    However, I have added a second form (Project->Add New Item->Windows Form) Form2.  When I get to testDialog->ShowDialog(this) it says "Expression to the left of . or -> has a type which could not be resolved".  I have done lots of fiddling but cant work out what I am doing wrong.

    When I type it all in anyway I get the following compile errors;

    Error 1 error C2065: 'Form2' : undeclared identifier 86
    Error 2 error C2065: 'test' : undeclared identifier 86
    Error 3 error C2061: syntax error : identifier 'Form2' 86
    Error 4 error C2227: left of '->ShowDialog' must point to class/struct/union/generic type 87

    Any ideas?

    I had it working in seconds using C# and obviously a minor alteration of code.

    Another thing I noticed was that C# IDE has a much better autocomplete feature than the C++ IDE, is this just a problem with me, or is it meant to be like it?

    Thank you for your time!
    Tuesday, June 5, 2007 7:43 PM


  • Code Snippet

    #include "Form2.h" //At the top of form 1

    It only took 3 hours to figure out.  haha.

    Wednesday, June 6, 2007 9:29 AM

All replies

  • Perhaps Form2 is in a different namespace? If so, you need to specify the fully qualified name for the type.
    Tuesday, June 5, 2007 7:53 PM
  • Hi,
    I have already checked that, I even tried using CPPTest::Form2 but to no avail (they are both in the namespace CPPTest)

    What I did notice to be strange is that when I type CPPTest::Form2, the Form2 bit autocompletes, as if it has detected Form2 fine, however, I get the compile error "Form2 is not a member of CPPTest"

    What else could I have done wrong??
    Wednesday, June 6, 2007 12:29 AM
  • Code Snippet

    #include "Form2.h" //At the top of form 1

    It only took 3 hours to figure out.  haha.

    Wednesday, June 6, 2007 9:29 AM
  • Hai,


    As a beginer in Visual C++, It helped me alot.



    Saturday, August 4, 2007 12:04 PM