This should work on Win2k (or WinXP maybe) Alpha Window: 200/255 alpha :call libcallnr("vimtweak.dll", "SetAlpha", 200) reset alpha :call libcallnr("vimtweak.dll", "SetAlpha", 255) Maximized Window: Enable :call libcallnr("vimtweak.dll", "EnableMaximize", 1) Disable :call libcallnr("vimtweak.dll", "EnableMaximize", 0) TopMost Window: Enable :call libcallnr("vimtweak.dll", "EnableTopMost", 1) Disab