I was trying to use windows api to find out the version info of an installed application.
I used the upgrade code to find out the product code using MsiEnumRelatedProduc
Here is what I did that my solved my problem.
Int32 m_len = 11512;
StringBuilder m_versionInfo = new StringBuilder(m_len);
StringBuilder m_sbProductCode = GetProductCodeFromMsiUpgradeCode();
MsiGetProductInfo(m_sbProductCode.ToString(), "**VersionString**", m_versionInfo, ref m_len);
return m_versionInfo.ToString();
This did return me the version string ,and also converted from decimal into string format like 1.4.3.