With the vector drawing "CorelDraw", as far as I know the procedure is complex and seldom satisfactory involving all sorts of transformations and dragging with the pick tool.
But if you have Photopaint.............
If you have Corel Photopaint - for editing any picture.
Open the image.
Choose Effects from the top menu bar
Select 3-D effects and Page Curl
At this point you have controls to set which corner, how much, and what shading you want.
In some circumstances and with a lot of trying it is possible to import a drawing into a new photopaint file and curl this. (Have just tried it)
If you want details of that then prepare for a long list of things to do!!