Invisible characters in SMS

[jdyim]

Hi,

I'd like to send invisible characters via SMS but found a strange problem. The sendui does not correctly recognize string length when I insert invisible characters such as TChar(0), TChar(30), etc. Is there any way I can solve this problem?

Here are my code; for 64, 32, 64, the length is 3 which is right (see image 64_32_64.jpg); while for 64, 30, 64, only 67 slots are left (64_30_64.jpg).

CMessageData* 	aMessage = CMessageData::NewLC();
CRichText* 	aRichText = CRichText::NewL(CParaFormatLayer::NewL(), CCharFormatLayer::NewL());

aRichText->InsertL( 0, (TChar)64 );
aRichText->InsertL( 0, (TChar)32 );
aRichText->InsertL( 0, (TChar)64 );
//1) sendui shows 157 (=160-3) characters available to be added

//aRichText->InsertL( 0, (TChar)64 );
//aRichText->InsertL( 0, (TChar)30 );
//aRichText->InsertL( 0, (TChar)64 );
//2) sendui shows only 67 slots are left

aMessage->SetBodyTextL( aRichText );

iSendUi->CreateAndSendMessageL(KSenduiMtmSmsUid, aMessage, KNullUid );

CleanupStack::PopAndDestroy(aMessage);

[wizard_hu_]

It is not about incorrect size, the MTM has switched to UCS-16 encoding. In this case the message can contain 70 Unicode (16-bit) characters. And 70-3 is...
You can check the details of the 7-bit GSM alphabet, it is not necessarily the same as 7-bit ASCII since sending control characters does not make much sense in case of SMS.