/// <summary>
/// Returns the object as an ISpecificPropertyPage
/// if the object supports the ISpecificPropertyPage
/// interface and has at least one property page.
/// </summary>
protected bool AddIfSupported(object o, string name)
{
ISpecifyPropertyPages specifyPropertyPages = null;
DsCAUUID pPages = new DsCAUUID();
bool wasAdded = false;
// Determine if the object supports the interface
// and has at least 1 property page
try
{
specifyPropertyPages = o as ISpecifyPropertyPages;
if (specifyPropertyPages != null)
{
int hr = specifyPropertyPages.GetPages(out pPages);
if ((hr != 0) || (pPages.cElems <= 0))
{
specifyPropertyPages = null;
}
}
}
finally
{
if (pPages.pElems != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pPages.pElems);
}
}
// Add the page to the internal collection
if (specifyPropertyPages != null)
{
DirectShowPropertyPage p = new DirectShowPropertyPage(name, specifyPropertyPages);
base.InnerList.Add(p);
wasAdded = true;
}
return(wasAdded);
}
/// <summary>
/// Returns the object as an ISpecificPropertyPage
/// if the object supports the ISpecificPropertyPage
/// interface and has at least one property page.
/// </summary>
protected bool AddIfSupported(object o, string name)
{
ISpecifyPropertyPages specifyPropertyPages = null;
DsCAUUID pPages = new DsCAUUID();
bool wasAdded = false;
// Determine if the object supports the interface
// and has at least 1 property page
try
{
specifyPropertyPages = o as ISpecifyPropertyPages;
if (specifyPropertyPages != null)
{
int hr = specifyPropertyPages.GetPages(out pPages);
if ((hr != 0) || (pPages.cElems <= 0))
{
specifyPropertyPages = null;
}
}
}
finally
{
if (pPages.pElems != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pPages.pElems);
}
}
// Add the page to the internal collection
if (specifyPropertyPages != null)
{
DirectShowPropertyPage p = new DirectShowPropertyPage(name, specifyPropertyPages);
base.InnerList.Add(p);
wasAdded = true;
}
return wasAdded;
}