EnumDisplaySettings (API)

[baka]

Using EnumDisplaySettings you can enumerate different display modes that your monitor can switch to.
I have looked into the DEVMODE property but I can't find what Im looking for.

so, what I would like to know is if theres a way to know if the monitor will "stretch" or keep the aspect ratio.
my current monitor will stretch the screen, making a 4:3 resolution look like 16:9.
while I know of a monitor that would change to 4:3 and keep the aspect ratio even if the monitor itself is a 16:9/10.

so, is there a way to know this? (without the need to change to that resolution and look at it manually of course)

or maybe theres a flag using ChangeDisplaySettings API that will keep the aspect ratio?

[jpbro]

On some monitors this is a menu setting on the device itself. In this case I wouldn't t think there's any way for Windows to know whether the aspect ratio has been preserved or not. There certainly wouldn't be any guarantee.

[Zvoni]

This?
https://docs.microsoft.com/en-us/win...-desktop-image

[baka]

yeah. I looked into the SetDisplayConfig API, but still no luck with it. will keep reading about it, as it could be a solution to do.

[baka]

the problem is that I get a invalid argument error code when I try to start it.

the API
Private Declare Function GetDisplayConfigBufferSizes Lib "user32" (Flags As Long, pNumPathArrayElements As Long, pNumModeInfoArrayElements As Long) As Long
from https://docs.microsoft.com/en-us/win...figbuffersizes

return 87 (E_INVALIDARG)
for flags, doesn't matter what I try:
Const QDC_ALL_PATHS As Long = &H1
Const QDC_ONLY_ACTIVE_PATHS As Long = &H2
Const QDC_DATABASE_CURRENT As Long = &H4

same error for any of the 3 flags. example
ret = GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, pathArraySize, modeArraySize)

ret will return as 87 instead of 0

[vbLewis]

Use byval for flags ...

Private Declare Function GetDisplayConfigBufferSizes Lib "user32" (Byval Flags As Long, pNumPathArrayElements As Long, pNumModeInfoArrayElements As Long) As Long

[Zvoni]

Yup.
ByVal for the first Parameter