WM_DPICHANGED_BEFOREPARENT message
For Per Monitor v2 top-level windows, this message is sent to all HWNDs in the child HWDN tree of the window that is undergoing a DPI change. This message occurs before the top-level window receives WM_DPICHANGED, and traverses the child tree from the bottom up.
#define WM_DPICHANGED_BEFOREPARENT 0x02E2
Parameters
-
wParam
-
This value is unused and will be zero.
-
lParam
-
This value is unused and will be zero.
Return value
This value is unused and ignored by the system.
Remarks
There is no default handling of this message in DefWindowProc.
This message is only sent when the top-level window has a DPI awareness context of PMv2.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 10, version 1703 [desktop apps only] |
| Minimum supported server |
Windows Server 2016 [desktop apps only] |
| Header |
|