regtest_cui.cpp

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/*-------------------------------------------------------
REGTEST.C -- 读写Windows安装序列号演示程序(code by Blowfish)
理解注册表函数的作用
-------------------------------------------------------*/

#include <Windows.h>
#include <iostream.h>

int main(void)
{
HKEY  hKey;	
char  SubKeyName[] = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion";	
char  ValueName[]  = "ProductID";	
BYTE  ValueData[64];  
DWORD BufferSize;	

if ( RegOpenKeyEx(HKEY_LOCAL_MACHINE, SubKeyName, 0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS )
	{  	
	cout<<"Error: RegOpenKeyEx"<<endl;	
	return -1;	
}  

BufferSize = sizeof(ValueData);	

if (RegQueryValueEx(hKey, ValueName, 0, NULL, ValueData, &BufferSize) != ERROR_SUCCESS)

	{  	
	cout<<"Error: RegQueryValueEx"<<endl;	
	RegCloseKey( hKey );	
	return -1;	
}	
cout<<"Your Windows Procduct ID is: "<<ValueData<<endl;	

RegCloseKey( hKey );

	return 0;

}