/// <summary>
/// GetDllInstance
/// </summary>
/// <param name="dllFileName"></param>
/// <returns></returns>
public IntPtr GetDllInstance(string dllFileName)
{
Assembly asm = Assembly.GetEntryAssembly() ?? Assembly.GetExecutingAssembly();
string directory = Path.GetDirectoryName(asm.Location);
// Working Directory
FileInfo workingDirectory = new FileInfo(dllFileName);
if (!File.Exists(workingDirectory.FullName))
{
// Application Directory
FileInfo applicationDirectory = new FileInfo(directory + "\\" + dllFileName);
if (!File.Exists(applicationDirectory.FullName))
{
throw new Exception(string.Format("File {0} not found!\n\nWorking Directory: {1}\nApplication Directory: {2}", dllFileName, workingDirectory.FullName, applicationDirectory.FullName));
}
dllFileName = directory + "\\" + dllFileName;
}
var _eposCmdDll = KernelDll.LoadLibrary(dllFileName);
if (_eposCmdDll == IntPtr.Zero)
{
throw new Exception(string.Format("{0} could not be loaded!", dllFileName));
}
return(_eposCmdDll);
}
/// <summary>
/// GetProcAddress
/// </summary>
/// <param name="dllHandle"></param>
/// <param name="funcName"></param>
/// <returns></returns>
public IntPtr GetProcAddress(IntPtr dllHandle, string funcName)
{
// Name "_VCM_xxxx@12"
var result = KernelDll.GetProcAddress(dllHandle, funcName);
if (result == IntPtr.Zero && funcName.Contains("@"))
{
funcName = funcName.Substring(1, funcName.IndexOf('@') - 1);
// Name "VCM_xxxx"
result = KernelDll.GetProcAddress(dllHandle, funcName);
}
return(result);
}
/// <summary>
/// FreeLibrary
/// </summary>
/// <param name="dllHandle"></param>
/// <returns></returns>
public bool FreeLibrary(IntPtr dllHandle)
{
bool result;
do
{
try
{
result = KernelDll.FreeLibrary(dllHandle);
}
catch (SEHException se)
{
MsgLogger.Exception($"{GetType().Name} - FreeLibrary", se.InnerException != null ? se.InnerException : se);
result = false;
}
catch (Exception e)
{
MsgLogger.Exception($"{GetType().Name} - FreeLibrary", e);
result = false;
}
}while(result);
return(result);
}