GUI Question + One error 2

[iranor]

So here I have test.cpp:

#include <winsock2.h>
#include <stdio.h>
#include <windows.h>
#include <wininet.h>
#include <lm.h>

BOOL kthx = TRUE;

if (kthx)
{
uninstall();
WSACleanup();
exit(0);
}

void uninstall(void)
{
//something long
}

When I click build, I get the following errors:

error C2059: syntax error: 'if'
error C2059: syntax error: missing ';' before '{'
error C2059: '{': missing function header (old-style formal list?)

Question 2: I'm wondering how works the GUI (or graphc interface).

With visual basic, there's a nice window that pops out with buttons, form options, labels, etc. Where is the similar for C++?

 

[Wings]

your if statement is not in a function.
In order to use a gui in visual c++, look into using MFC. You can create a MFC project, and you will see the forms you are looking for.

 

[drewdaman]

is this all there is to your project? as wings said, you can't just do stuff in the body of a file without declaring a function- possibly the main method as well- (with the exception of preprocessor stuff).

i would suggest using MFC instead of just plain old win32 API (its a pain in the ***!)... but learning MFC is not a small thing! i don't know it very well myself, but here is a good link.. you have to register.. but the tutorial is good:

http://devcentral.iticentral.com/articles/MFC/default.php

read atleast teh first 2 tutorials (if you're using visual c++).

here are a few more links:

http://www.msoe.edu/eecs/cese/resources/cppbuild/msvcmfc/mfc.htm

http://www.codersource.net/mfc_tutorial_part3.html

 

[drewdaman]

I have also used VB in the past.. MFC is not quite as simple as that! but i hear it is much more powerful (i dont' knwo it very well!).

also, i heard that they have a new form based thingy for GUIs in MSVC++ .NET. if you are using that, you might want to look into it. can't offer much mroe help on that tho

 

[iranor]

Ok, thanks, I removed the if statement and replaced uninstall() with main(). It works!

For the GUI, here is my situation. I want a main window with a combo box, and 3 buttons: Close, About, Info.

The user pick something from the combo box, click Info and opens a new dialog box that shows info about the app using switch().

My current basic code is:

#using <mscorlib.dll>
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;

__gc class DisplayForm : public Form
{
public:
	DisplayForm();	
private:
	ComboBox *appList;

	Button *btnClose;
	Button *btnAbout;
	Button *btnInfo;

	void CloseClick(Object *Sender, EventArgs *Args);
	void AboutClick(Object *Sender, EventArgs *Args);
	void InfoClick(Object *Sender, EventArgs *Args);
	void SelectionChanged(Object *Sender, EventArgs *Args);
};

DisplayForm::DisplayForm()
{

	this->Text = S"App Info";
	this->MinimizeBox = false;
	this->MaximizeBox = false;
	Size = Drawing::Size(420, 320);

	appList = new ComboBox;
	appList->Location = Point(16, 30);
	appList->Text = S"Test1";
	appList->Items->Add(S"Test2");
	appList->Items->Add(S"Test1");
	appList->add_SelectedIndexChanged(new EventHandler(this, SelectionChanged));
	this->Controls->Add(appList);
        //more code here
}

void DisplayForm::SelectionChanged(Object *Sender, EventArgs *Args)
{
	txtIntro->Text = appList->Text;
} //?? useless, i think

void DisplayForm::CloseClick(Object *Sender, EventArgs *Args)
{
	Close();
}

void DisplayForm::AboutClick(Object *Sender, EventArgs *Args)
{
	//Clicked aobut
}

void DisplayForm::InfoClick(Object *Sender, EventArgs *Args)
{
	//Clicked info (how to open new dialog and passing the appList->Text; var?
}

int __stdcall WinMain()
{
	DisplayForm *SF = new DisplayForm();
	Application::Run(SF);

	return 0;
}

Is it the right thing to use? Any suggestion on how I could make it better? (And pass the application name from the combo box to the new dialog )

 

[Wings]

you are now using managed c++ which is different from MFC. With a simple user interface like you are making, that should work just fine.

Good luck.