PRB: Right Mouse with Manual OLE D&D Disables Left Mouse

MORE INFORMATION

Steps to Reproduce Behavior

1. Place the following code in a new program file and save it as Test.prg:

         PUBLIC oform1
   
         oform1=NEWOBJECT("form1")
         oform1.Show
         RETURN
   
         **************************************************
         *-- Form:         form1
         *-- ParentClass:  form
         *-- BaseClass:    form
         *
         DEFINE CLASS form1 AS form
   
   
            Top = 1
            Left = 2
            Height = 350
            Width = 474
            DoCreate = .T.
            OLEDropMode = 1
            Caption = "Try to move the form by dragging after right "+ ;
              "clicking the button"
            WindowState = 0
            BackColor = RGB(0,128,128)
            Name = "Form1"
   
   
            ADD OBJECT command1 AS commandbutton WITH ;
               Top = 120, ;
               Left = 240, ;
               Height = 73, ;
               Width = 97, ;
               Caption = "Right Click Me", ;
               Name = "Command1"
   
   
            PROCEDURE command1.MouseDown
               LPARAMETERS nButton, nShift, nXCoord, nYCoord
               IF nButton=2
               *   NODEFAULT
                   This.OLEDrag(.T.)
               ENDIF
            ENDPROC
   
            PROCEDURE command1.OLEDrag
               LPARAMETERS lDetectDrag
               IF lDetectDrag
                  This.ForeColor=RGB(0,255,64)
               ELSE
                  This.ForeColor=RGB(255,0,255)
               ENDIF
            ENDPROC
   
            PROCEDURE command1.OLECompleteDrag
               LPARAMETERS nEffect
               This.ResetToDefault("ForeColor")
            ENDPROC
   
            PROCEDURE command1.OLEStartDrag
               LPARAMETERS oDataObject, nEffect
               nEffect=3
            ENDPROC
   
         ENDDEFINE
   							

2. Run the Test.prg program.
3. Right-click the command button. The caption text should change color when you click the button. This is just for visual confirmation.
4. Try to move the form by dragging the title bar with the left mouse. The left mouse button should act disabled, or in other words, you should not be able to move the form. You may have to right-click the command button more than once, because this behavior does not always occur.
5. Right-clicking anywhere on the form enables the left mouse button allowing you to move or close the form.
6. Edit the Test.prg file and remove the remark on the NODEFAULT keyword in the command1.MouseDown procedure. Save and rerun the form. Note that the left mouse button is not disabled.