/// <summary>
/// Attempts to add a new ACM driver from a file
/// </summary>
/// <param name="driverFile">Full path of the .acm or dll file containing the driver</param>
/// <returns>Handle to the driver</returns>
public static AcmDriver AddLocalDriver(string driverFile)
{
IntPtr handle = NativeMethods.LoadLibrary(driverFile);
if (handle == IntPtr.Zero)
{
throw new ArgumentException("Failed to load driver file");
}
var driverProc = NativeMethods.GetProcAddress(handle, "DriverProc");
if (driverProc == IntPtr.Zero)
{
NativeMethods.FreeLibrary(handle);
throw new ArgumentException("Failed to discover DriverProc");
}
IntPtr driverHandle;
var result = AcmInterop.acmDriverAdd(out driverHandle,
handle, driverProc, 0, AcmDriverAddFlags.Function);
if (result != MmResult.NoError)
{
NativeMethods.FreeLibrary(handle);
throw new MmException(result, "acmDriverAdd");
}
var driver = new AcmDriver(driverHandle);
// long name seems to be missing when we use acmDriverAdd
if (string.IsNullOrEmpty(driver.details.longName))
{
driver.details.longName = "Local driver: " + Path.GetFileName(driverFile);
driver.localDllHandle = handle;
}
return(driver);
}
/// <summary>
/// Removes a driver previously added using AddLocalDriver
/// </summary>
/// <param name="localDriver">Local driver to remove</param>
public static void RemoveLocalDriver(AcmDriver localDriver)
{
if (localDriver.localDllHandle == IntPtr.Zero)
{
throw new ArgumentException("Please pass in the AcmDriver returned by the AddLocalDriver method");
}
var removeResult = AcmInterop.acmDriverRemove(localDriver.driverId, 0); // gets stored as a driver Id
NativeMethods.FreeLibrary(localDriver.localDllHandle);
MmException.Try(removeResult, "acmDriverRemove");
}
/// <summary>
/// Finds a Driver by its short name
/// </summary>
/// <param name="shortName">Short Name</param>
/// <returns>The driver, or null if not found</returns>
public static AcmDriver FindByShortName(string shortName)
{
foreach (AcmDriver driver in AcmDriver.EnumerateAcmDrivers())
{
if (driver.ShortName == shortName)
{
return(driver);
}
}
return(null);
}
/// <summary>
/// Removes a driver previously added using AddLocalDriver
/// </summary>
/// <param name="localDriver">Local driver to remove</param>
public static void RemoveLocalDriver(AcmDriver localDriver)
{
if (localDriver.localDllHandle == IntPtr.Zero)
{
throw new ArgumentException("Please pass in the AcmDriver returned by the AddLocalDriver method");
}
var removeResult = AcmInterop.acmDriverRemove(localDriver.driverId, 0); // gets stored as a driver Id
NativeMethods.FreeLibrary(localDriver.localDllHandle);
MmException.Try(removeResult, "acmDriverRemove");
}
/// <summary>
/// Attempts to add a new ACM driver from a file
/// </summary>
/// <param name="driverFile">Full path of the .acm or dll file containing the driver</param>
/// <returns>Handle to the driver</returns>
public static AcmDriver AddLocalDriver(string driverFile)
{
IntPtr handle = NativeMethods.LoadLibrary(driverFile);
if (handle == IntPtr.Zero)
{
throw new ArgumentException("Failed to load driver file");
}
var driverProc = NativeMethods.GetProcAddress(handle, "DriverProc");
if (driverProc == IntPtr.Zero)
{
NativeMethods.FreeLibrary(handle);
throw new ArgumentException("Failed to discover DriverProc");
}
IntPtr driverHandle;
var result = AcmInterop.acmDriverAdd(out driverHandle,
handle, driverProc, 0, AcmDriverAddFlags.Function);
if (result != MmResult.NoError)
{
NativeMethods.FreeLibrary(handle);
throw new MmException(result, "acmDriverAdd");
}
var driver = new AcmDriver(driverHandle);
// long name seems to be missing when we use acmDriverAdd
if (string.IsNullOrEmpty(driver.details.longName))
{
driver.details.longName = "Local driver: " + Path.GetFileName(driverFile);
driver.localDllHandle = handle;
}
return driver;
}
