I would like to find the values of some of windows API constants, such as, but not limited to LVM_ENABLEGROUPVIEW & WM_SHOWWINDOW
Looking on the n
You can use ApiViewer. Initially developed for VB6, it can be set up to show declarations in object pascal language which could save you some typing.
Mind you though, its database is not perfect. Some function definitios are incorrect, some constants too (like 0xFFFF instead of 0xFFFFFFFF).