Screen Resolution reading and changing

[RFBourquin]

I can't seem to find any function which will allow me to obtain the Windows screen resolution and/or set it in C++.
I would like to be able to change it, then change it back.

Thanx

[vijayan121]

http://msdn2.microsoft.com/en-us/library/ms533265.aspx
http://msdn2.microsoft.com/en-us/library/ms533235.aspx

[RFBourquin]

Thanx. Now I just have to figure out how to use it. I will, eventually.

[kbshibukumar]

I can't seem to find any function which will allow me to obtain the Windows screen resolution and/or set it in C++.
I would like to be able to change it, then change it back.

Thanx

To get the screen resolution, you can use the function GetWindowRect(). I've written an article in my blog.
http://cppkid.wordpress.com/2009/01/07/how-to-get-the-screen-resolution-in-pixels/

[orbidden]

I'm also trying to do the same thing and i'm running on windows xp. i kind of understand the links you gave RFBourquin except i'm pretty new to C++, only using it in a class for the past 6 weeks. I'm having trouble understanding how to use the commands from http://msdn.microsoft.com/en-us/library/dd183413.aspx. i was hoping someone could give an example of using the commands from that page and change the resolution to 800 x 600 as an example please. thank you.

[RFBourquin]

(First, declare the device mode class)
DEVMODE NewDevice;

(The members of this class you will need)
NewDevice.dmSize = sizeof(DEVMODE);
NewDevice.dmPelsWidth = 1024;
NewDevice.dmPelsHeight = 768;

(In the main program)
ChangeDisplaySettings(&NewDevice, 0);

[chiwawa10]

You may want to have a look at WMI (windows management instrumentation). It provides an extensive API for accessing your systems information.

[7sedam7]

I get the following errors please help

Error 1 error LNK2028: unresolved token (0A0000AD) "extern "C" long __stdcall ChangeDisplaySettingsW(struct _devicemodeW *,unsigned long)" (?ChangeDisplaySettingsW@@$$J18YGJPAU_devicemodeW@@K@Z) referenced in function "private: void __clrcall UI::Form1::About_Click(class System::Object ^,class System::EventArgs ^)" (?About_Click@Form1@UI@@$$FA$AAMXP$AAVObject@System@@P$AAVEventArgs@4@@Z) C:\Users\7sedam7\documents\visual studio 2010\Projects\UI\UI\UI.obj

Error 2 error LNK2019: unresolved external symbol "extern "C" long __stdcall ChangeDisplaySettingsW(struct _devicemodeW *,unsigned long)" (?ChangeDisplaySettingsW@@$$J18YGJPAU_devicemodeW@@K@Z) referenced in function "private: void __clrcall UI::Form1::About_Click(class System::Object ^,class System::EventArgs ^)" (?About_Click@Form1@UI@@$$FA$AAMXP$AAVObject@System@@P$AAVEventArgs@4@@Z) C:\Users\7sedam7\documents\visual studio 2010\Projects\UI\UI\UI.obj

Error 1 error LNK2028: unresolved token (0A0000AD)