c++怎样给文件右键菜单添加一项！给桌面文件右键添加菜单项

#include <Windows.h>
#include <iostream>
#include <string>
using namespace std;

void add(string strMenuText, string strApplication);
void del(string strMenuText);

int main(){
	system("pause");
	return 0;
}

void add(string strMenuText, string strApplication){
	//添加右键菜单项"加密该文件"
	HKEY hresult;  
	long value;
	//string strRegKeyName = "我的加密";
	string strRegKeyName = strMenuText;
	string strRegKey = "*\\shell\\" + strRegKeyName;//if txt file, please use "txtfile\\shell\\用我的文本编辑程序打开"
	string strRegSubkey="*\\shell\\" + strRegKeyName + "\\command";
	//string strMenuText="加密该文件"; 
	//string strApplication="E:\\Desktop\\Use\\xsearch_CHS.exe %1";
	strApplication = strApplication + " %1";

	DWORD dwPos;  
	//创建“加密”子键,并设置右键菜单项的名称
	value=RegCreateKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegKey.c_str(),0,NULL,REG_OPTION_NON_VOLATILE,KEY_CREATE_SUB_KEY|KEY_ALL_ACCESS,NULL,&hresult,&dwPos);
	value=RegSetValueEx(hresult,NULL,0,REG_SZ,(BYTE*)(LPCTSTR)strMenuText.c_str(), strMenuText.length()); 
	
	//创建“command”子键，并设置关联的应用程序
	value=RegCreateKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegSubkey.c_str(),0,NULL,REG_OPTION_NON_VOLATILE,KEY_CREATE_SUB_KEY|KEY_ALL_ACCESS,NULL,&hresult,&dwPos);
	value=RegSetValueEx(hresult,NULL,0,REG_SZ,(const BYTE*)(LPCTSTR)strApplication.c_str(),strApplication.length());

	//关闭注册表
	::RegCloseKey(hresult);
}

void del(string strMenuText){
	HKEY hKey;
	//string strRegKeyName = "我的加密";
	string strRegKeyName = strMenuText;
	string strRegKey="*\\shell\\" + strRegKeyName;  
	string strRegSubkey="*\\shell";  
	
	//打开父键
	long lRet=::RegOpenKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegKey.c_str(),0,KEY_READ,&hKey);  
	
	//删除“command”子键  
	::RegDeleteKey(hKey,LPCTSTR("command"));  
	::RegCloseKey(hKey);  
	
	lRet=::RegOpenKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegSubkey.c_str(),0,KEY_READ,&hKey);
	
	//删除“加密”子键  
	::RegDeleteKey(hKey,LPCTSTR(strRegKeyName.c_str()));  
	::RegCloseKey(hKey);
}

下面是一个比较完整的例子：

#include <Windows.h>
#include <iostream>
#include <string>
#include "CommDlg.h"

using namespace std;

bool add(string strMenuText, string strApplication);
bool del(string strMenuText);
string openDlg();

int main(){
	while(true){
		cin.clear();
		cin.sync();
		int m = 0;
		cout << "(1)添加桌面菜单项 (2)删除桌面菜单项 (3)退出：";
		cin >> m;

		if(m == 1){
			std::string name, path;
			cout << "请输入菜单名：";

			cin.clear();
			cin.sync();
			getline(cin,name);
			cout << "输入程序路径：";

			cin.clear();
			cin.sync();
			//getline(cin, path);
			path = openDlg();
			if(!add(name, path)){
				cout << "添加失败！请以管理员身份运行" << endl;
			}else{
				cout << "添加完成！右键点击任意文件看看" << endl;
			}
		}

		if(m == 2){
			std::string name;
			cout << "请输入菜单名：";

			cin.clear();
			cin.sync();
			cin >> name;
			if(!del(name)){
				cout << "删除失败！请以管理员身份运行" << endl;
			}else{
				cout << "删除成功！" << endl;
			}
		}

		if(m == 3){
			return 0;
		}
	}
	system("pause");
	return 0;
}

string openDlg(){
TCHAR szBuffer[MAX_PATH] = {0};   
OPENFILENAME ofn= {0};   
ofn.lStructSize = sizeof(ofn);   
ofn.hwndOwner = NULL;   
ofn.lpstrFilter = ("Exe文件(*.exe)\0*.exe\0所有文件(*.*)\0*.*\0");//要选择的文件后缀   
ofn.lpstrInitialDir =  ("C:\\Program Files");//默认的文件路径   
ofn.lpstrFile = szBuffer;//存放文件的缓冲区   
ofn.nMaxFile = sizeof(szBuffer)/sizeof(*szBuffer);   
ofn.nFilterIndex = 0;   
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER ;//标志如果是多选要加上OFN_ALLOWMULTISELECT  
BOOL bSel = GetOpenFileName(&ofn);   
return szBuffer;
}

bool add(string strMenuText, string strApplication){
	//添加右键菜单项"加密该文件"
	HKEY hresult;  
	long value;
	//string strRegKeyName = "我的加密";
	string strRegKeyName = strMenuText;
	string strRegKey = "*\\shell\\" + strRegKeyName;//if txt file, please use "txtfile\\shell\\用我的文本编辑程序打开"
	string strRegSubkey="*\\shell\\" + strRegKeyName + "\\command";
	//string strMenuText="加密该文件"; 
	//string strApplication="E:\\Desktop\\Use\\xsearch_CHS.exe %1";
	strApplication = strApplication + " %1";

	DWORD dwPos;  
	//创建“加密”子键,并设置右键菜单项的名称
	value=RegCreateKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegKey.c_str(),0,NULL,REG_OPTION_NON_VOLATILE,KEY_CREATE_SUB_KEY|KEY_ALL_ACCESS,NULL,&hresult,&dwPos);
	if(0 != value){
		return false;
	}
	
	value=RegSetValueEx(hresult,NULL,0,REG_SZ,(BYTE*)(LPCTSTR)strMenuText.c_str(), strMenuText.length()); 
		if(0 != value){
		return false;
	}

	//创建“command”子键，并设置关联的应用程序
	value=RegCreateKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegSubkey.c_str(),0,NULL,REG_OPTION_NON_VOLATILE,KEY_CREATE_SUB_KEY|KEY_ALL_ACCESS,NULL,&hresult,&dwPos);
	if(0 != value){
		return false;
	}
	
	value=RegSetValueEx(hresult,NULL,0,REG_SZ,(const BYTE*)(LPCTSTR)strApplication.c_str(),strApplication.length());
	if(0 != value){
		return false;
	}
	//关闭注册表
	::RegCloseKey(hresult);
}

bool del(string strMenuText){
	HKEY hKey;
	//string strRegKeyName = "我的加密";
	string strRegKeyName = strMenuText;
	string strRegKey="*\\shell\\" + strRegKeyName;  
	string strRegSubkey="*\\shell";  
	
	//打开父键
	long lRet=::RegOpenKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegKey.c_str(),0,KEY_READ,&hKey);  
	if(0 != lRet){
		return false;
	}
	//删除“command”子键  
	lRet = ::RegDeleteKey(hKey,LPCTSTR("command"));  
	if(0 != lRet){
		return false;
	}
	::RegCloseKey(hKey);  
	
	lRet=::RegOpenKeyEx(HKEY_CLASSES_ROOT,(LPSTR)(LPCSTR)strRegSubkey.c_str(),0,KEY_READ,&hKey);
	if(0 != lRet){
		return false;
	}
	//删除“加密”子键  
	lRet = ::RegDeleteKey(hKey,LPCTSTR(strRegKeyName.c_str()));  
	if(0 != lRet){
		return false;
	}
	::RegCloseKey(hKey);
}