避免打開雙視窗

#include <windows.h>

#define Executable "test.exe"
char TITLE[] = "The SoftW";//full title name "The SoftWare"
int size;

BOOL CALLBACK EnumWindowsProc(HWND hwnd, DWORD lParam) 
{
    //get hwnd title
    char buffer[255];    
    SendMessage(hwnd,WM_GETTEXT,255,(long)buffer);
    
    //check title is we want
    if(strncmp(buffer,TITLE,size)==0)
    {
        //if window is iconic, show it as normal
        if(IsIconic(hwnd))
            ShowWindow(hwnd, SW_RESTORE);
            
        //show it at top of desktop
        SetForegroundWindow(hwnd);
        
        //we got it
        return FALSE;
    }
    
    //to check next hwnd
    return TRUE;
}

int main(int argc, char** argv)
{
    //check title size,remove '\0'
    size = sizeof(TITLE)/sizeof(char);
    size--;
    
    //check window is show or not
    if(EnumWindows((WNDENUMPROC)EnumWindowsProc,0)==TRUE)
    {
        //if window not show, to execute it
        WinExec(Executable,SW_SHOW);
    }
    
    return 0;
}