Is indesign SDK supports, inmath to ascii format thru programmatically (js or vb).
This is the Scripting forum, not the InDesign SDK forum. Aside from that: surely any questions regarding external plugins (whether about scripting or if Adobe's SDK supports the scripts plug-ins other firms made -- if I understand you correctly) could better be answered by the plugin supplier ...
In the case of InMath: i.t.i.p. support