MessageBox

[Originalhanno]

Hallo zusammen,
ich habe ein Probelm beim erzeugen einer MessageBox.
folgender Code:

#pragma once

namespace Hook_Form {
	#include "stdafx.h"
	#include <windows.h>
    #include "..\Hook Dll\Hook.h"
	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
	///
	/// WARNING: If you change the name of this class, you will need to change the
	///          'Resource File Name' property for the managed resource compiler tool
	///          associated with all .resx files this class depends on.  Otherwise,
	///          the designers will not be able to interact properly with localized
	///          resources associated with this form.
	/// </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: System::Windows::Forms::Button^  install_button;
	private: System::Windows::Forms::Button^  uninstall_button;
	protected: 

	protected: 

	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->install_button = (gcnew System::Windows::Forms::Button());
			this->uninstall_button = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// install_button
			// 
			this->install_button->Location = System::Drawing::Point(342, 92);
			this->install_button->Name = L"install_button";
			this->install_button->Size = System::Drawing::Size(75, 23);
			this->install_button->TabIndex = 0;
			this->install_button->Text = L"Install";
			this->install_button->UseVisualStyleBackColor = true;
			this->install_button->Click += gcnew System::EventHandler(this, &Form1::install_button_Click);
			// 
			// uninstall_button
			// 
			this->uninstall_button->Location = System::Drawing::Point(341, 154);
			this->uninstall_button->Name = L"uninstall_button";
			this->uninstall_button->Size = System::Drawing::Size(75, 23);
			this->uninstall_button->TabIndex = 1;
			this->uninstall_button->Text = L"UnInstall";
			this->uninstall_button->UseVisualStyleBackColor = true;
			this->uninstall_button->Click += gcnew System::EventHandler(this, &Form1::uninstall_button_Click);
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(807, 661);
			this->Controls->Add(this->uninstall_button);
			this->Controls->Add(this->install_button);
			this->Name = L"Form1";
			this->Text = L"Form1";
			this->ResumeLayout(false);

		}
#pragma endregion
	private: System::Void install_button_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
			 MessageBox("Hallo");
			 InstallHooks();
		 }
	private: System::Void uninstall_button_Click(System::Object^  sender, System::EventArgs^  e) 
		{
			UnInstallHooks();
		 }
	};
}

ergibt folgenden Fehler:

Error	1	error C2660: 'Hook_Form::MessageBox' : function does not take 1 arguments	c:\documents and settings\mw\my documents\visual studio 2005\projects\maus hook\hook_form\Form1.h	108

Kann mir jemand helfen?

[PuppetMaster2k]

MessageBox::Show("Test", "Überschrift", MessageBoxButtons::OK, MessageBoxIcon::Exclamation );

[Originalhanno]

Super, danke!
Kannst DU mir auch sagen, warum ich in anderen Anwendungen die MB so aufrufen kann, wie ich es probiert habe?
Was muss ich machen, außer
#include <windows.h>???

[Originalhanno]

Wollte das ganz nun in einer DLL machen:

#define MAKE_DLL

// INCLUDES //////////////////////////////////////////////////////////////

#include <windows.h>
#include <fstream>

#include "Hook.h"

// DEFINES ///////////////////////////////////////////////////////////////

// CONSTANTS /////////////////////////////////////////////////////////////

// GLOBALS ///////////////////////////////////////////////////////////////

#pragma data_seg ("shared")
//int iNumInstances = 0;
int iKeystrokes[255] = {0};
#pragma data_seg ()
#pragma comment(linker,"/SECTION:shared,RWS")

// PROTOTYPES ////////////////////////////////////////////////////////////

LRESULT CALLBACK MouseHookProc(int, WPARAM, LPARAM);
void OutputKeystrokes();

// VARIABLES /////////////////////////////////////////////////////////////

HINSTANCE	hDllInstance;
HHOOK		hMouseHook;

// METHODS ///////////////////////////////////////////////////////////////

// FUNCTIONS /////////////////////////////////////////////////////////////

int APIENTRY DllMain(HINSTANCE hInstance, DWORD fdwReason, PVOID pvReserved)
{
	hDllInstance = hInstance;

	return TRUE;
}

BOOL CALLBACK InstallHooks(void)
{
	MessageBox::Show("Test");
	hMouseHook = SetWindowsHookEx(WH_MOUSE,
                                     MouseHookProc,
                                     hDllInstance,
                                     NULL
                                     );

    if (hMouseHook == NULL)
    {
        return FALSE;
    }

    return TRUE;
}

BOOL CALLBACK UnInstallHooks(void)
{
    OutputKeystrokes();

    return UnhookWindowsHookEx(hMouseHook);
}

LRESULT CALLBACK MouseHookProc(int nCode, WPARAM wParam,LPARAM lParam)
{
	if(nCode < 0)
		return CallNextHookEx(hMouseHook, nCode, wParam, lParam);

    // Verhindern das eine Nachricht mehrmals verarbeitet wird.
	if(nCode == HC_ACTION)
    {
        // Prüfen ob die Taste nicht gedrückt gehalten wurde.
        // Wenn dies der Fall ist, ist das 31. Bit _nicht_ gesetzt.
        if (!(lParam&0x40000000))
        {
            // VK-Code als Index in ein Array, dessen Eintrag
            // pro Druck um eins erhöht wird.
            iKeystrokes[wParam]++;
        }
    }

	return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
}

void OutputKeystrokes()
{
    std::ofstream out("c:\\mousehook.txt");

    for (int i='A'; i<='Z'; i++)
    {
        out << (char)i << " = " << iKeystrokes[i] << "\n";
    }
}

Fehler:

Error	1	error C2653: 'MessageBoxA' : is not a class or namespace name	c:\documents and settings\mw\my documents\visual studio 2005\projects\maus hook\hook dll\hook.cpp	56
Error	2	error C3861: 'Show': identifier not found	c:\documents and settings\michael worobcuk\my documents\visual studio 2005\projects\maus hook\hook dll\hook.cpp	56

Währe für nochmalige Hilfe dankbar...

[Jochen Kalmbach]

Wenn Du <windows.h> einbindest, dann wird hier ein "define" für "MessageBox" eingebunden ,was dann diverse Verwirrungen auslösen kann.
Deshalb vorher (also *nach* dem #include <windows.h>) ein

#undef MessageBox

machen, damit es wieder eindeutig wird...

[Originalhanno]

Hi,
nun also:

#define MAKE_DLL

// INCLUDES //////////////////////////////////////////////////////////////

#include <windows.h>
#undef MessageBox;
#include <fstream>

#include "Hook.h"

// DEFINES ///////////////////////////////////////////////////////////////

// CONSTANTS /////////////////////////////////////////////////////////////

// GLOBALS ///////////////////////////////////////////////////////////////

#pragma data_seg ("shared")

// iNumInstances = 0;
HHOOK hMouseHook =0;
int iKeystrokes[255] = {0};
#pragma data_seg ()
#pragma comment(linker,"/SECTION:shared,RWS")

// PROTOTYPES ////////////////////////////////////////////////////////////

LRESULT CALLBACK MouseHookProc(int, WPARAM, LPARAM);
void OutputKeystrokes();

// VARIABLES /////////////////////////////////////////////////////////////

HINSTANCE	hDllInstance;

// METHODS ///////////////////////////////////////////////////////////////

// FUNCTIONS /////////////////////////////////////////////////////////////

int APIENTRY DllMain(HINSTANCE hInstance, DWORD fdwReason, PVOID pvReserved)
{
	hDllInstance = hInstance;

	return TRUE;
}

BOOL CALLBACK InstallHooks(void)
{
	MessageBox::("Test");
	if (hMouseHook  ==0) hMouseHook = SetWindowsHookEx(WH_MOUSE, MouseHookProc, hDllInstance, NULL);

    if (hMouseHook == NULL)
    {
        return FALSE;
    }

    return TRUE;
}

BOOL CALLBACK UnInstallHooks(void)
{
    OutputKeystrokes();

    return UnhookWindowsHookEx(hMouseHook);
}

LRESULT CALLBACK MouseHookProc(int nCode, WPARAM wParam,LPARAM lParam)
{
	std::ofstream out("c:\\mousehook.txt");
	if(nCode < 0) return CallNextHookEx(hMouseHook, nCode, wParam, lParam);

//	out << (char)lParam-> << "\n";

	return CallNextHookEx(hMouseHook, nCode, wParam, lParam);
}

void OutputKeystrokes()
{
    /*

    for (int i='A'; i<='Z'; i++)
    {
        out << (char)i << " = " << iKeystrokes[i] << "\n";
    }*/
}

Das ergibt:

Error	2	error C3861: 'MessageBox': identifier not found	c:\documents and settings\mw\my documents\visual studio 2005\projects\maus hook\hook dll\hook.cpp	59

[Jochen Kalmbach]

Was willst Du jetzt eigentlich machen?
Windows-Forms oder native Win32 ???

In Deinem ersten Beispiel war es noch

MessageBox::Show

und jetzt plötzlich nicht mehr...

Also, ganz simple Regel:
Windows-Forms (also C++/CLI), dann

#undef MessageBox

Win32-API:
(kein undef)

[Originalhanno]

Auch bei einem

MessageBox::Show("Test");

kommt:

Error	2	error C2653: 'MessageBox' : is not a class or namespace name	c:\documents and settings\mw\my documents\visual studio 2005\projects\maus hook\hook dll\hook.cpp	59
Error	3	error C3861: 'Show': identifier not found	c:\documents and settings\mw\my documents\visual studio 2005\projects\maus hook\hook dll\hook.cpp	59

auch bei einem

#undef MessageBox

Ich checks leider nicht...