Insertion a record in a table having columns of different charsets using OLEDB

My development environment -
Database -> Microsoft SQL Server
2008 R2
OS -> Windows Server
2008 R2
Database Charset -> Chinese_PRC_CI_AS (Windows
936)
Operating System Charset -> Chinese
Below table is having varchar fields with different charsets.
create
table dbo.tcolcs1 (
    c1 int
not
null
primary
key,
    c2 varchar(30)
collate SQL_Latin1_General_Cp1_CI_AS ,
    c3 varchar(30)
collate Chinese_PRC_CI_AS
I want to insert below record using OLEDB APIs provided by Microsoft. Just for information, character '0x00C4' does not
belong to Windows 936 codepage.
insert
into dbo.tcolcs1
values (10,
NCHAR(0x00C4), NCHAR(0x4EBC))
Code snippet -
DBPARAMBINDINFO bind_info
memset(&bind_info,
0, sizeof(DBPARAMBINDINFO));
bind_info.pwszDataSourceType = L"DBTYPE_VARCHAR";
bind_info.wType = DBTYPE_STR;
I have bound the varchar field with DBTYPE_STR. I can see that my code is not inserting Latin1 character (0x00C4) correctly
into the table. The code always inserts a blank character into Latin1 column (c2) and 0x4EBC into Chinese column (c3).
Later, I changed the binding from DBTYPE_STR to DBTYPE_BYTES as below -
bind_info.pwszDataSourceType = L"DBTYPE_BINARY";
bind_info.ulParamSize =
0;
bind_info.wType = DBTYPE_BYTES;
With the above change, I observed that OLEDB is converting hex value to string. It is inserting 0x00C4 as 'C4' and 0x4EBC
as '4EBC'. I also tried with adding 'AutoTranslate=no' in driver connection string, but it did not help. How can I insert above record with OLEDB in the above table ?
Thanks in advance.

Did you try making fields as unicode?
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