You missed a comma before the 14 on the red and cancel buttons, along with in several other places.
Here is the fix:
Code:MyDB DIALOG 18, 18, 142, 92 CAPTION "Test Dialog Box" STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION | WS_SYSMENU { DEFPUSHBUTTON "Red", IDD_RED, 32, 40, 30, 14, WS_CHILD | WS_VISIBLE | WS_TABTOP //error line PUSHBUTTON "Green", IDD_GREEN, 74, 40, 30, 14, WS_CHILD | WS_VISIBLE | WS_TABTOP PUSHBUTTON "Cancel", IDC_CANCEL, 52, 65, 37,14, WS_CHILD | WS_VISIBLE | WS_TABTOP }