public int GetNewStorage(out UnsafeNativeMethods.IStorage storage)
{
Debug.WriteLineIf(RichTextDbg.TraceVerbose, "IRichTextBoxOleCallback::GetNewStorage");
UnsafeNativeMethods.ILockBytes pLockBytes = UnsafeNativeMethods.CreateILockBytesOnHGlobal(NativeMethods.NullHandleRef, true);
Debug.Assert(pLockBytes != null, "pLockBytes is NULL!");
storage = UnsafeNativeMethods.StgCreateDocfileOnILockBytes(pLockBytes, NativeMethods.STGM_SHARE_EXCLUSIVE | NativeMethods.STGM_CREATE | NativeMethods.STGM_READWRITE, 0);
Debug.Assert(storage != null, "storage is NULL!");
return(NativeMethods.S_OK);
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
private void CreateStorage() {
Debug.Assert(storage == null, "but we already have a storage!!!");
IntPtr hglobal = IntPtr.Zero;
if (buffer != null) {
hglobal = UnsafeNativeMethods.GlobalAlloc(NativeMethods.GMEM_MOVEABLE, length);
IntPtr pointer = UnsafeNativeMethods.GlobalLock(new HandleRef(null, hglobal));
try {
if (pointer != IntPtr.Zero) {
Marshal.Copy(buffer, 0, pointer, length);
}
}
finally {
UnsafeNativeMethods.GlobalUnlock(new HandleRef(null, hglobal));
}
}
bool failed = false;
try {
iLockBytes = UnsafeNativeMethods.CreateILockBytesOnHGlobal(new HandleRef(null, hglobal), true);
if (buffer == null) {
storage = UnsafeNativeMethods.StgCreateDocfileOnILockBytes(iLockBytes,
NativeMethods.STGM_CREATE | NativeMethods.STGM_READWRITE | NativeMethods.STGM_SHARE_EXCLUSIVE, 0);
}
else {
storage = UnsafeNativeMethods.StgOpenStorageOnILockBytes(iLockBytes,
null, NativeMethods.STGM_READWRITE | NativeMethods.STGM_SHARE_EXCLUSIVE, 0, 0);
}
}
catch (Exception t) {
Debug.Fail(t.ToString());
failed = true;
}
if (failed) {
if (iLockBytes == null && hglobal != IntPtr.Zero) {
UnsafeNativeMethods.GlobalFree(new HandleRef(null, hglobal));
}
else {
iLockBytes = null;
}
storage = null;
}
}
