how to pass lots of data from unmaged to manage code using CCW

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hello everyone

i want to send lots of data from unmanaged to mange code using CCW.

i have made this kind of code with variant, but it was slow..

for example

because i have to make variant type like safearray, before send variant to
manage code.

so there is loop to make variant type..

how can i solve this kind of problem.

please..help me..