Windows下获取MySQL安装目录的实用函数

int GetMysqlDir(char *pMysqlDir, int nSize, char *pSvcName= "MySQL")
{
char szAppPath[MAX_PATH]={0},szDrive[MAX_PATH]={0},szFileName[MAX_PATH]={0},szFolder[MAX_PATH]={0}, szRunKey[MAX_PATH]={0};
HKEY hKey;
int result = -1;
sprintf(szRunKey, "SYSTEM\\CurrentControlSet\\Services\\%s", pSvcName);
if(::RegOpenKey(HKEY_LOCAL_MACHINE, szRunKey , &hKey) == ERROR_SUCCESS)   
{
DWORD         dwType=2;
DWORD         dwBytes  = MAX_PATH; 
char  szKeyValue[MAX_PATH]={0};
if(RegQueryValueEx(hKey, "ImagePath", 0, &dwType, (unsigned char *)szKeyValue, &dwBytes) == ERROR_SUCCESS)
{
char *pch = strstr(szKeyValue, "\\bin\\");
if(pch)
{
pch[1] = 0;  // 去除文件名子目录部分
if(szKeyValue[0] == '\"')
strncpy(pMysqlDir, szKeyValue+1, nSize-1); //  去除多余引号
else
strncpy(pMysqlDir, szKeyValue, nSize-1);
result = 0;
}
else
result = -1;

RegCloseKey(hKey);
return result;
}