For the search for electroweak (EW) particles in the Minimal Supersymmetric
Standard Model (MSSM) as well as for future precision analyses of these
particles an accurate knowledge of their production and decay properties
We evaluate the cross sections for the chargino, neutralino and
slepton production at $e^+e^-$ colliders in the MSSM with complex
The evaluation is based on a full one-loop calculation of all possible
production channels including soft and hard photon radiation.
The dependence of the cross sections on the relevant
cMSSM parameters is analyzed numerically. We find sizable contributions
to many production cross sections. They amount to roughly $15\,\%$ of
the tree-level results but can go up to $40\,\%$ or higher in extreme
cases. Also the dependence on complex parameters of the one-loop
corrections for many production channels was found non-negligible.
The full one-loop contributions are thus crucial for physics analyses
at a future linear $e^+e^-$ collider such as the ILC or CLIC.