求助，关于GetAsyncKeyState

#include<bits/stdc++.h>
#include<windows.h>
#define KEY_DOWN(VK_NONAME) ((GetAsyncKeyState(VK_NONAME) & 0x8000) ? 1:0) 
using namespace std;
void KEY(int vk){
	if(KEY_DOWN(vk)){
		int x=clock();
		cout<<"you down the "<<vk<<" key at "<<x<<"ms\n";
		while(KEY_DOWN(vk));
		int y=clock();
		cout<<"you down the "<<vk<<" key "<<y-x<<"ms\n";
	}
} 
int main(){
	while(1){
		for(int i=0;i<128;i++)
		KEY(i);
	}
}