EnumDisplayDevicesA not working, but EnumDisplayDevicesW works.

A simple program that attempts to return the list of graphics devices. Works in Windows but not working in ROS. Driver VirtualBox installed. The system sees it, but no program can detect the presence of (name is not returned).

In log line out:
(win32ss/user/ntuser/display.c:306) err: No GRAPHICS_DEVICE found

P.S. The program algorithm is as follows: call internal function GetVideoCard->EnumDisplayDevices->return result GetVideoCard->show result GetVideoCard. An error occurs while returning the result of the function GetVideoCard. If I try to display the result GetVideoCard in the text box - the text is not readable. If the result I trying to display in MessageBox - error in Kernel32.dll. In Wine, the program runs fine. I checked using a MessageBox the function GetVideoCard. To the exit from the function, everything works fine (including EnumDisplayDevices). Curiously, this error only occurs in EnumDisplayDevicesA version.