ATL / WTL / STL

5-Jul-15 23:32

i am getting error

error : expected unqualified-id

public ref class Form1 : public System::Windows::Forms::Form
^
error : expected unqualified-id
[STAThreadAttribute]
^
error : use of undeclared identifier 'STAThreadAttribute'
[STAThreadAttribute]
^
3 errors generated.

i am using clang compiler to build the project

what could be the possible reasons for this? How could I solve this?

thanks

Richard MacCutchan6-Jul-15 0:07

6-Jul-15 0:07

Check the preceding lines to see if there is an incomplete statement.

VScoder126-Jul-15 15:45

6-Jul-15 15:45

there is only pragma and namespace above the error-ed public keyword-

XML

#pragma once

namespace test4 {

    namespace System{};
    namespace System{namespace ComponentModel{}};
    namespace System{namespace Collections{}};
    namespace System{namespace Windows{namespace Forms{}}};
    namespace System{namespace Data{}};
    namespace System{namespace Drawing{}};

    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();

error is not shown above the public keyword

I had replaced-

using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;

with

CSS

namespace System{};
    namespace System{namespace ComponentModel{}};
    namespace System{namespace Collections{}};
    namespace System{namespace Windows{namespace Forms{}}};
    namespace System{namespace Data{}};
    namespace System{namespace Drawing{}};

because i was getting error with the first one.

Richard MacCutchan6-Jul-15 21:46

6-Jul-15 21:46

Those changes are completely wrong. You have removed the using keywords, and added lots of unnecessary brace characters. I suggest you create a new clean Form project from the Visual Studio templates.

VScoder126-Jul-15 23:29

6-Jul-15 23:29

Hi,

If I use using then I get the following errors-

error : expected namespace name
 using namespace System;                         ^
 error : use of undeclared identifier 'System'
using namespace System::ComponentModel;
                 ^
 error : expected namespace name
     using namespace System::ComponentModel;
                              ^
 error : use of undeclared identifier 'System'
using namespace System::Collections;
                  ^
and so on....including buttons...

So, I used the namespace with curly braces{} suggested somewhere on the net

Using that I don't get these errors but then I have trouble with Public keyword.

what can I do? Is clang compiler doing this?

Richard MacCutchan6-Jul-15 23:35

6-Jul-15 23:35

VScoder12 wrote:
So, I used the namespace with curly braces{} suggested somewhere on the net

Don't. Using information from the internet without knowing what you are doing is not the way to get your program to work.

I am beginning to suspect that you are not using the CLR option on your project, so the compiler thinks this is unmanaged C++. Check your settings again.

VScoder127-Jul-15 1:34

7-Jul-15 1:34

I used Visual C++ > CLR > Windows Forms Application in my project creation

I think it is not recognizing the System namespace

If I use curly braces i think it recognizes System namespace but then it does not recognize the Private keyword

any suggestion?

Richard MacCutchan7-Jul-15 1:56

7-Jul-15 1:56

VScoder12 wrote:
any suggestion?

Not really. I have just created a new Windows Forms application using Visual C++ 2010 Express, and it creates the correct files, and compiles without error. I can only assume that something is missing from your Visula Studio setup that causes these errors. The generated code of the two main files is as follows, you could try it in your system.:

C++

// Form1.h 
#pragma once

namespace WinForm {

    using namespace System;
    using namespace System::ComponentModel;
    using namespace System::Collections;
    using namespace System::Windows::Forms;
    using namespace System::Data;
    using namespace System::Drawing;
    
    /// <summary>
    /// Summary for Form1
    /// </summary>
    public ref class Form1 : public System::Windows::Forms::Form
    {
    public:
        Form1(void)
        {
            InitializeComponent();
            //
            //TODO: Add the constructor code here
            //
        }
    
    protected:
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        ~Form1()
        {
            if (components)
            {
                delete components;
            }
        }
    
    private:
        /// <summary>
        /// Required designer variable.
        /// </summary>
        System::ComponentModel::Container ^components;
        
        #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)
        {
            this->components = gcnew System::ComponentModel::Container();
            this->Size = System::Drawing::Size(300,300);
            this->Text = L"Form1";
            this->Padding = System::Windows::Forms::Padding(0);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
        }
    #pragma endregion
    };
}


// WinForm.cpp : main project file.

#include "stdafx.h"
#include "Form1.h"

using namespace WinForm;

[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
    // Enabling Windows XP visual effects before any controls are created
    Application::EnableVisualStyles();
    Application::SetCompatibleTextRenderingDefault(false); 
    
    // Create the main window and run it
    Application::Run(gcnew Form1());
    return 0;
}

VScoder127-Jul-15 16:11

7-Jul-15 16:11

if i use win32 then mine also compile and runs successfully

but i am having trouble with compiling/building with clang compiler as mentioned earlier

Brisingr Aerowing7-Jul-15 17:29

Brisingr Aerowing

7-Jul-15 17:29

Clang doesn't support C++/CLI, while Microsoft's compilers do. That's the issue.

What do you get when you cross a joke with a rhetorical question?

The metaphorical solid rear-end expulsions have impacted the metaphorical motorized bladed rotating air movement mechanism.

Do questions with multiple question marks annoy you???

Richard MacCutchan7-Jul-15 22:58

7-Jul-15 22:58

VScoder12 wrote:
clang compiler

What is that, and what does it have to do with Visula Studio?

Brisingr Aerowing8-Jul-15 3:23

Brisingr Aerowing

8-Jul-15 3:23

Clang Compiler[^]

An open-source compiler.

Richard MacCutchan8-Jul-15 3:26

MFC multi languages UI question

8-Jul-15 3:26

Yeah, I missed the significance of that in the opening question.

Message Closed

29-Sep-15 3:45

HighClassAsianEscort

29-Sep-15 3:45

Message Closed

econy26-Jun-15 3:34

econy

26-Jun-15 3:34

I implemented a multi language UI in a MFC program, since only a few controls, so I write translation in code, I knew it can be implemented with DLL, or String Table.

Now I wonder what way is better, in code, string table, or DLL,according to run time performance and space consuming. Smile | :)

Re: MFC multi languages UI question

Albert Holguin26-Jun-15 10:55

Albert Holguin

26-Jun-15 10:55

If your program isn't huge, no reason to do this in an external library, that would definitely be the slowest and most (disk) space consuming method.

I'd say string table would probably be fast, and as long as you don't have too many strings, it shouldn't be too costly. If you have a huge number of strings, you may start using up quite a bit of memory to support this, then the library method starts to become more appealing.

user32!IsWindow crash

yu-jian2-Jun-15 0:42

yu-jian

2-Jun-15 0:42

Hello everyone,

I meet a crash problem. just as following, I donot know why IsWindow will crash,
Is there anyone meet the same problem?

AULTING_IP:
user32!IsWindow+1a
761a7150 8365fc00 and dword ptr [ebp-4],0

EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 761a7150 (user32!IsWindow+0x0000001a)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000001
Parameter[1]: fffffffc
Attempt to write to address fffffffc

ChildEBP RetAddr Args to Child

06f9ff48 72d229bb 04e73a50 6928d287 00000000 user32!IsWindow+0x1a
06f9ff80 72d22a47 00000000 7710338a 04e74990 msvcr80!_callthreadstartex+0x1b [f:\sp\vctools\crt_bld\self_x86\crt\src\threadex.c @ 348]
06f9ff88 7710338a 04e74990 06f9ffd4 776b9f72 msvcr80!_threadstartex+0x66 [f:\sp\vctools\crt_bld\self_x86\crt\src\threadex.c @ 326]
06f9ff94 776b9f72 04e74990 70af11ab 00000000 kernel32!BaseThreadInitThunk+0xe
06f9ffd4 776b9f45 72d229e1 04e74990 00000000 ntdll!__RtlUserThreadStart+0x70
06f9ffec 00000000 72d229e1 04e74990 00000000 ntdll!_RtlUserThreadStart+0x1b

Re: user32!IsWindow crash

Richard MacCutchan2-Jun-15 5:13