Marks the beginning of a dbe idiom sequence.
#include <X11/extensions/Xdbe.h>
Status XdbeBeginIdiom(
    Display *dpy)
        This function marks the beginning of an idiom sequence.
DBE, XdbeAllocateBackBufferName(), XdbeDeallocateBackBufferName(), XdbeEndIdiom(), XdbeFreeVisualInfo(), XdbeGetBackBufferAttributes(), XdbeGetVisualInfo(), XdbeQueryExtension(), XdbeSwapBuffers().