/// <summary>
/// Updates the current printer device default DEVMODE
/// </summary>
/// <param name="devModeBytes">New DEVMODE settings to apply</param>
/// <param name="biDirectional">If true updates the devModeBytes array with resolved merge conflicts</param>
/// </summary>
private void SetDocumentProperties(byte[] devModeBytes, bool biDirectional)
{
long result = -1;
DocumentPropertiesFlags flags = biDirectional ? (DocumentPropertiesFlags.DM_IN_BUFFER | DocumentPropertiesFlags.DM_OUT_BUFFER) : DocumentPropertiesFlags.DM_IN_BUFFER;
SafeMemoryHandle outPtr = SafeMemoryHandle.Null;
using (SafeMemoryHandle buffer = SafeMemoryHandle.Create(devModeBytes.Length))
{
buffer.CopyFromArray(devModeBytes, 0, devModeBytes.Length);
if (biDirectional)
{
outPtr = buffer;
}
result = UnsafeNativeMethods.DocumentPropertiesW(new HandleRef(this, IntPtr.Zero), this._deviceHandle, this._deviceName, outPtr, buffer, flags);
if (result < 0)
{
throw new Win32Exception();
}
if (!outPtr.IsInvalid)
{
outPtr.CopyToArray(devModeBytes, 0, devModeBytes.Length);
}
}
}
public static extern int DocumentPropertiesW(
HandleRef hWnd,
SafeWinSpoolPrinterHandle printer,
string deviceName,
SafeMemoryHandle devModeOutput,
SafeMemoryHandle devModeInput,
DocumentPropertiesFlags mode);
/// <summary>
/// Updates the current printer device default DEVMODE
/// </summary>
/// <param name="devModeBytes">New DEVMODE settings to apply</param>
/// <param name="biDirectional">If true updates the devModeBytes array with resolved merge conflicts</param>
/// </summary>
private void SetDocumentProperties(byte[] devModeBytes, bool biDirectional)
{
long result = -1;
DocumentPropertiesFlags flags = biDirectional ? (DocumentPropertiesFlags.DM_IN_BUFFER | DocumentPropertiesFlags.DM_OUT_BUFFER) : DocumentPropertiesFlags.DM_IN_BUFFER;
SafeMemoryHandle outPtr = SafeMemoryHandle.Null;
// Assert Unmanaged code - to allocate a native buffer for DocumentPropertiesW
// - and read from\write to that buffer
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Assert();
try
{
using (SafeMemoryHandle buffer = SafeMemoryHandle.Create(devModeBytes.Length))
{
buffer.CopyFromArray(devModeBytes, 0, devModeBytes.Length);
if (biDirectional)
{
outPtr = buffer;
}
result = UnsafeNativeMethods.DocumentPropertiesW(new HandleRef(this, IntPtr.Zero), this._deviceHandle, this._deviceName, outPtr, buffer, flags);
if (result < 0)
{
throw new Win32Exception();
}
if (!outPtr.IsInvalid)
{
outPtr.CopyToArray(devModeBytes, 0, devModeBytes.Length);
}
}
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
