WM_RBUTTONDOWN
fwKeys = wParam; /* key flags */
xPos = LOWORD(lParam); /* horizontal position of cursor */
yPos = HIWORD(lParam); /* vertical position of cursor */The WM_RBUTTONDOWN message is sent when the user presses the right mouse button.
fwKeys
Indicates whether various virtual keys are down. This parameter can be any combination of the following values:
| Value | Description |
| MK_CONTROL | Set if CTRL key is down. |
| MK_LBUTTON | Set if left mouse button is down. |
| MK_MBUTTON | Set if middle mouse button is down. |
| MK_SHIFT | Set if SHIFT key is down. |
xPos
Value of the low-order word of lParam. Specifies the x-coordinate of the cursor. The coordinate is relative to the upper-left corner of the window.
yPos
Value of the high-order word of lParam. Specifies the y-coordinate of the cursor. The coordinate is relative to the upper-left corner of the window.
An application should return zero if it processes this message.