Let the program run only one C + + Builder implementation at the same time

Source: Let the program run only one

Many people have discussed this problem, which is done with the existing shared memory feature in the Victor serial control. when the program runs the second time, it simply activates the first run window instead of running a program.

Need to be implemented in the main program, belowthe blue partIs the added content:

#include <vcl.h> #pragma hdrstop

#include "yb_base.h"

//---------------------------------------------------------------------------

Useform ("UnitTestMain.cpp", Form1);

//---------------------------------------------------------------------------

WINAPI WinMain (hinstance, HINSTANCE, LPSTR, int)

{

//Two programs cannot have the same flag, programs with the same flag can only run one

tsharedmemory Appmark ("victor_20030526_2131", 4096); //Use shared memory to Set program flags

if (appmark.exists) //The program is already running

{

Appmark.activeappwnd (); //Activate a program window that is already running

return 0; //Exit program

}

Appmark.clearbuffer (); //Clear Cache

Try

{

Application->initialize ();

Application->createform (__classid (TFORM1), &form1);

Appmark.appinfo->hmainwnd = application->handle; //Handle is saved in shared memory

Application->run ();

}

catch (Exception &exception)

{

//.... Omit for future content

Let the program run only one C + + Builder implementation at the same time (go)