Here's a simple function that will go through and select the highest resolution for you.
/* Find Highest Rez */ void SetDisplay() //Cycle Through 11 Resolution Modes and Find The Highest { if (dbCheckDisplayMode ( 1680, 1050, 32 )) { dbSetDisplayMode ( 1680, 1050, 32 ); //break; } else if (dbCheckDisplayMode ( 1600, 1024, 32 )) { dbSetDisplayMode ( 1600, 1024, 32 ); //break; } else if (dbCheckDisplayMode ( 1440, 900, 32 )) { dbSetDisplayMode ( 1440, 900, 32 ); //break; } else if (dbCheckDisplayMode ( 1400, 1050, 32 )) { dbSetDisplayMode ( 1400, 1050, 32 ); //break; } else if (dbCheckDisplayMode ( 1280, 1024, 32 )) { dbSetDisplayMode ( 1280, 1024, 32 ); //break; } else if (dbCheckDisplayMode ( 1280, 960, 32 )) { dbSetDisplayMode ( 1280, 960, 32 ); //break; } else if (dbCheckDisplayMode ( 1280, 800, 32 )) { dbSetDisplayMode ( 800, 600, 32 ); //break; } else if (dbCheckDisplayMode ( 1280, 720, 32 )) { dbSetDisplayMode ( 1280, 720, 32 ); //break; } else if (dbCheckDisplayMode ( 1152, 864, 32 )) { dbSetDisplayMode ( 1152, 864, 32 ); //break; } else if (dbCheckDisplayMode ( 1024, 768, 32 )) { dbSetDisplayMode ( 1024, 768, 32 ); //break; } else if (dbCheckDisplayMode ( 800, 600, 32 )) { dbSetDisplayMode ( 800, 600, 32 ); //break; } }