自己解决了 // test_onlyOneExe.cpp : Defines the class behaviors for the application. //#include "stdafx.h" #include "test_onlyOneExe.h" #include "test_onlyOneExeDlg.h"#ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif///////////////////////////////////////////////////////////////////////////// // CTest_onlyOneExeAppBEGIN_MESSAGE_MAP(CTest_onlyOneExeApp, CWinApp) //{{AFX_MSG_MAP(CTest_onlyOneExeApp) // NOTE - the ClassWizard will add and remove mapping macros here. // DO NOT EDIT what you see in these blocks of generated code! //}}AFX_MSG ON_COMMAND(ID_HELP, CWinApp::OnHelp) END_MESSAGE_MAP()///////////////////////////////////////////////////////////////////////////// // CTest_onlyOneExeApp constructionCTest_onlyOneExeApp::CTest_onlyOneExeApp() { // TODO: add construction code here, // Place all significant initialization in InitInstance }///////////////////////////////////////////////////////////////////////////// // The one and only CTest_onlyOneExeApp objectCTest_onlyOneExeApp theApp;///////////////////////////////////////////////////////////////////////////// // CTest_onlyOneExeApp initializationBOOL CTest_onlyOneExeApp::InitInstance() { if(!IsFirstInstance("test_onlyOneExe")) return false; AfxEnableControlContainer(); // Standard initialization // If you are not using these features and wish to reduce the size // of your final executable, you should remove from the following // the specific initialization routines you do not need.#ifdef _AFXDLL Enable3dControls(); // Call this when using MFC in a shared DLL #else Enable3dControlsStatic(); // Call this when linking to MFC statically #endif CTest_onlyOneExeDlg dlg; m_pMainWnd = &dlg; int nResponse = dlg.DoModal(); if (nResponse == IDOK) { // TODO: Place code here to handle when the dialog is // dismissed with OK } else if (nResponse == IDCANCEL) { // TODO: Place code here to handle when the dialog is // dismissed with Cancel } // Since the dialog has been closed, return FALSE so that we exit the // application, rather than start the application's message pump. return FALSE; }BOOL CTest_onlyOneExeApp::IsFirstInstance(CString title) { CWnd *pWndPrev, *pWndChild; if (pWndPrev = CWnd::FindWindow(NULL,title)) { //AfxMessageBox( _TEXT("只允许一个实例在运行!")); pWndChild = pWndPrev->GetLastActivePopup(); if (pWndPrev->IsIconic()) pWndPrev->ShowWindow(SW_RESTORE); pWndChild->SetForegroundWindow(); //找到并激活到前端 CString sCopyData = GetCommandLine(); COPYDATASTRUCT cpd; cpd.dwData = 0; cpd.cbData = sCopyData.GetLength() + 1;//多加一个长度,防止乱码 cpd.lpData = (void*)sCopyData.GetBuffer(cpd.cbData); pWndChild->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd); // pWndChild->PostMessage(WM_GXMSG,0,100);//发消息让已经有的实例到前段,当然也可以发消息让其退出 return FALSE; } else return TRUE; // 第一个实例}
---这个方法可以
// test_onlyOneExe.cpp : Defines the class behaviors for the application.
//#include "stdafx.h"
#include "test_onlyOneExe.h"
#include "test_onlyOneExeDlg.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CTest_onlyOneExeAppBEGIN_MESSAGE_MAP(CTest_onlyOneExeApp, CWinApp)
//{{AFX_MSG_MAP(CTest_onlyOneExeApp)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG
ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CTest_onlyOneExeApp constructionCTest_onlyOneExeApp::CTest_onlyOneExeApp()
{
// TODO: add construction code here,
// Place all significant initialization in InitInstance
}/////////////////////////////////////////////////////////////////////////////
// The one and only CTest_onlyOneExeApp objectCTest_onlyOneExeApp theApp;/////////////////////////////////////////////////////////////////////////////
// CTest_onlyOneExeApp initializationBOOL CTest_onlyOneExeApp::InitInstance()
{
if(!IsFirstInstance("test_onlyOneExe"))
return false; AfxEnableControlContainer(); // Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif CTest_onlyOneExeDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
// TODO: Place code here to handle when the dialog is
// dismissed with OK
}
else if (nResponse == IDCANCEL)
{
// TODO: Place code here to handle when the dialog is
// dismissed with Cancel
} // Since the dialog has been closed, return FALSE so that we exit the
// application, rather than start the application's message pump.
return FALSE;
}BOOL CTest_onlyOneExeApp::IsFirstInstance(CString title)
{
CWnd *pWndPrev, *pWndChild;
if (pWndPrev = CWnd::FindWindow(NULL,title))
{
//AfxMessageBox( _TEXT("只允许一个实例在运行!"));
pWndChild = pWndPrev->GetLastActivePopup();
if (pWndPrev->IsIconic())
pWndPrev->ShowWindow(SW_RESTORE);
pWndChild->SetForegroundWindow(); //找到并激活到前端 CString sCopyData = GetCommandLine();
COPYDATASTRUCT cpd;
cpd.dwData = 0;
cpd.cbData = sCopyData.GetLength() + 1;//多加一个长度,防止乱码
cpd.lpData = (void*)sCopyData.GetBuffer(cpd.cbData);
pWndChild->SendMessage(WM_COPYDATA,NULL,(LPARAM)&cpd); // pWndChild->PostMessage(WM_GXMSG,0,100);//发消息让已经有的实例到前段,当然也可以发消息让其退出
return FALSE;
}
else
return TRUE; // 第一个实例}