public static bool IsApiAvailable(string libName, string procName)
{
bool value = false;
if (!string.IsNullOrEmpty(libName) && !string.IsNullOrEmpty(procName))
{
Tuple <string, string> key = new Tuple <string, string>(libName, procName);
if (availableApis.TryGetValue(key, out value))
{
return(value);
}
IntPtr intPtr = CommonUnsafeNativeMethods.LoadLibraryFromSystemPathIfAvailable(libName);
if (intPtr != IntPtr.Zero)
{
IntPtr procAddress = CommonUnsafeNativeMethods.GetProcAddress(new HandleRef(value, intPtr), procName);
if (procAddress != IntPtr.Zero)
{
value = true;
}
}
CommonUnsafeNativeMethods.FreeLibrary(new HandleRef(value, intPtr));
availableApis[key] = value;
}
return(value);
}