IntPtr CreatePrinterDC(ref PAGESETUPDLGSTRUCT lppsd)
{
// Create managed structure for DEVNAMES
DEVNAMES dn = new DEVNAMES();
Marshal.PtrToStructure(lppsd.hDevNames, dn);
// Get base address of native structure
int iBase = (int)lppsd.hDevNames;
// Get pointer to driver name.
IntPtr iptrDriver = (IntPtr)(iBase + dn.wDriverOffset);
string strDriver = Marshal.PtrToStringUni(iptrDriver);
// Get pointer to device name.
IntPtr iptrDevice = (IntPtr)(iBase + dn.wDeviceOffset);
string strDevice = Marshal.PtrToStringUni(iptrDevice);
// Get pointer to output port.
IntPtr iptrOutput = (IntPtr)(iBase + dn.wOutputOffset);
string strOutput = Marshal.PtrToStringUni(iptrOutput);
IntPtr hdc = CreateDC(iptrDriver, iptrDevice, iptrOutput,
lppsd.hDevMode);
return(hdc);
}
void InitDlgStruct(
ref PAGESETUPDLGSTRUCT psd,
IntPtr hwndParent)
{
psd.lStructSize = Marshal.SizeOf(psd);
psd.Flags = 0;
psd.hwndOwner = hwndParent;
}
void Close(ref PAGESETUPDLGSTRUCT lppsd)
{
if (lppsd.hDevMode != IntPtr.Zero)
{
NativeHeap.LocalFree(lppsd.hDevMode);
}
if (lppsd.hDevNames != IntPtr.Zero)
{
NativeHeap.LocalFree(lppsd.hDevNames);
}
}
string QueryOutputPort(ref PAGESETUPDLGSTRUCT lppsd)
{
// Create managed structure for DEVNAMES
DEVNAMES dn = new DEVNAMES();
Marshal.PtrToStructure(lppsd.hDevNames, dn);
// Get base address of native structure
int iBase = (int)lppsd.hDevNames;
// Get pointer to output port.
IntPtr iptrOutput = new IntPtr(iBase + dn.wOutputOffset);
string strOutput = Marshal.PtrToStringUni(iptrOutput);
return(strOutput);
}
int ShowDialog(ref PAGESETUPDLGSTRUCT psd)
{
return(PageSetupDlgW(ref psd));
}
int PageSetupDlgW(ref PAGESETUPDLGSTRUCT lppsd);