private IntPtr AllocMsaaMenuInfo()
{
this.FreeMsaaMenuInfo();
this.msaaMenuInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MsaaMenuInfoWithId)));
int size = IntPtr.Size;
MsaaMenuInfoWithId structure = new MsaaMenuInfoWithId(this.data.caption, this.uniqueID);
Marshal.StructureToPtr(structure, this.msaaMenuInfoPtr, false);
return(this.msaaMenuInfoPtr);
}
internal static MenuItem GetMenuItemFromItemData(IntPtr itemData)
{
uint uniqueID = (uint)((long)itemData);
if (uniqueID == 0)
{
return(null);
}
if (IntPtr.Size == 4)
{
if (uniqueID < 0xc0000000)
{
MsaaMenuInfoWithId id = (MsaaMenuInfoWithId)Marshal.PtrToStructure(itemData, typeof(MsaaMenuInfoWithId));
uniqueID = id.uniqueID;
}
}
else
{
MsaaMenuInfoWithId id2 = (MsaaMenuInfoWithId)Marshal.PtrToStructure(itemData, typeof(MsaaMenuInfoWithId));
uniqueID = id2.uniqueID;
}
return(GetMenuItemFromUniqueID(uniqueID));
}
private IntPtr AllocMsaaMenuInfo()
{
this.FreeMsaaMenuInfo();
this.msaaMenuInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MsaaMenuInfoWithId)));
int size = IntPtr.Size;
MsaaMenuInfoWithId structure = new MsaaMenuInfoWithId(this.data.caption, this.uniqueID);
Marshal.StructureToPtr(structure, this.msaaMenuInfoPtr, false);
return this.msaaMenuInfoPtr;
}
// Creates an MSAAMENUINFO structure (in the unmanaged heap) based on the current state
// of this MenuItem object. Address of this structure is cached in the object so we can
// free it later on using FreeMsaaMenuInfo(). If structure has already been allocated,
// it is destroyed and a new one created.
private IntPtr AllocMsaaMenuInfo() {
FreeMsaaMenuInfo();
msaaMenuInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MsaaMenuInfoWithId)));
// To check it's 32-bit OS or 64-bit OS.
if (IntPtr.Size == 4) {
// We only check this on Win32, irrelevant on Win64 (see CreateMenuItemInfo)
Debug.Assert(((uint) (ulong) msaaMenuInfoPtr) < firstUniqueID); // ...check for incursion into menu item ID range (unlikely!)
}
MsaaMenuInfoWithId msaaMenuInfoStruct = new MsaaMenuInfoWithId(data.caption, uniqueID);
Marshal.StructureToPtr(msaaMenuInfoStruct, msaaMenuInfoPtr, false);
Debug.Assert(msaaMenuInfoPtr != IntPtr.Zero);
return msaaMenuInfoPtr;
}
