form1.h

《VC++2005编程实例》第二章的源代码

#pragma once


namespace Example {

	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>
	/// Form1 摘要
	///
	/// 警告: 如果更改此类的名称，则需要更改
	///          与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
	///          “资源文件名”属性。否则，
	///          设计器将不能与此窗体的关联
	///          本地化资源正确交互。
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: 在此处添加构造函数代码
			//
		}

	protected:
		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}

	private:
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要
		/// 使用代码编辑器修改此方法的内容。
		/// </summary>
		void InitializeComponent(void)
		{
			System::ComponentModel::ComponentResourceManager^  resources = (gcnew System::ComponentModel::ComponentResourceManager(Form1::typeid));
			this->SuspendLayout();
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->BackgroundImage = (cli::safe_cast<System::Drawing::Image^  >(resources->GetObject(L"$this.BackgroundImage")));
			this->ClientSize = System::Drawing::Size(390, 180);
			this->Name = L"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = L"演示禁止程序同时运行两个实例";
			this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
			this->ResumeLayout(false);

		}
#pragma endregion
//实现禁止程序同时运行两个实例
private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
	bool bExist;
	System::Threading::Mutex^ MyMutex=gcnew System::Threading::Mutex(true,"OnlyOneTime",bExist);
	if(bExist)
	{		
		MyMutex->ReleaseMutex();
	}
	else
	{
		MessageBox::Show("程序已经运行!","信息提示",MessageBoxButtons::OK,MessageBoxIcon::Information);
		this->Close();
	}
}
	};
}