AX 2012 - Add segmented entry control to a form for a ledger dimension

If you add segmented entry control directly to form you'll see lookups etc.. won't work. Look at the this clear Microsoft's whitepaper:
http://msdn.microsoft.com/en-us/library/hh300644.aspx

AXAPTA - Setfocus to a specified control when opening form

Should write a setfocus for control at form's firstField method:

public void firstField(int _flags=1)
{
    super(_flags);
    EmplId2.setFocus();
}

Hide lookup button for a form control

Hide lookup button for a form control:

 DSerial.lookupButton(FormLookupButton::Never);

AXAPTA control with code a field of datasource at form.

It's so easy. You have to use object array for that:    

SMAObjectGroup_ds.object(fieldnum(SMAServiceObjectGroup,
        Barebone)).enabled(SMAObjectGroup.ServiceItemType == B_ServiceItemType::Item);

AXAPTA splitter control

There isn't a true splitter control in Axapta. There is a class made by group panels. There are a lot of forms use this control.

Write these at ClassDeclaration:

    SysFormSplitter_X               _VerticalSplitter;
    SysFormSplitter_Y               _HorizontalSplitter;

First was for vertical splitter, second was horizontal. Put this code part to forms init method:

   _VerticalSplitter = new SysFormSplitter_X(VerticalSplitter,groupLeft,element);
   _HorizontalSplitter = new SysFormSplitter_Y(HorizontalSplitter,groupTop,element);

Arrangements for vertical splitter:

VerticalSplitter at up is group control for use vertical splitter control. It parameters are:
AlignChild = No
AlignControl = Yes
AutoDeclaration = Yes
BackgroundColor = Window background
FrameType = Raised 3D
HideifEmpty = No
Height = Column height
Width = 5
We put two group controls of vertical splitter one is left and one is right and it's parents column value should 3. This is important for a correct screening.Make Autodeclaration = Yes for left group. (It's name is groupLeft at upper). It's Height value must be Column Height, Width may be like 100-200, width value will be change and save after we move the splitter. Right groups height value should be column height and width value should be column width.
Vertical splitters methods are should be like:

int mouseUp(int x, int y, int button, boolean ctrl, boolean shift)
{
    int ret;

    ret = super(x, y, button, ctrl, shift);

    Return _VerticalSplitter.mouseUp(x, y, button, ctrl, shift);
}

int mouseMove(int x, int y, int button, boolean ctrl, boolean shift)
{
    int ret;

    ret = super(x, y, button, ctrl, shift);

    Return _VerticalSplitter.mouseMove(x,y,button,ctrl,shift);
}

int mouseDown(int x, int y, int button, boolean ctrl, boolean shift)
{
    int ret;

    ret = super(x, y, button, ctrl, shift);

    Return _VerticalSplitter.mouseDown(x, y, button, ctrl, shift);
}

Arrangements for horizontal splitter:
I'll just tell differences with vertical.Different parameters:
Columns = 1 for splitters parent control.
Height = 5
Width =Column Width

Upper groups name is groupTOP for our sample. Height value may be like 100-200 and Width value is Column width. Methods names different; instead of _VerticalSplitter, _HorizontalSplitter. Lower groups Width value is Column Width and Height value is Column Height.