using System;
using System.Runtime.InteropServices;
class test
{
[DllImport("kernel32.dll")]
private static extern int Beep(int dwFreq ,int dwDuration) ; public static void Main()
{
int a=0X7FF;
int b=1000;
Beep(a,b);
}
}
using System;
using System.Runtime.InteropServices;
class test
{
[DllImport("kernel32.dll")]
private static extern int Beep(int dwFreq ,int dwDuration) ; public static void Main()
{
int a=0X7FF;
int b=1000;
Beep(a,b);
}
}
using System.Runtime.InteropServices;
class test
{
[DllImport("kernel32.dll")]
private static extern int Beep(int dwFreq ,int dwDuration) ; public static void Main()
{
int a=0X7FF;
int b=1000;
Beep(a,b);
}
}
using System;
using System.Runtime.InteropServices;
class test
{
[DllImport("kernel32.dll")]
private static extern int Beep(int dwFreq ,int dwDuration) ; public static void Main()
{
int a=0X7FF;
int b=1000;
Beep(a,b);
}
}
解决方案 »
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