Left
Horizontal position in device-independent points, relative to the parent container.
Range: -100000 to 100000.
Use flow layout instead of maintaining every child coordinate manually.
Flow layout is useful for a variable number of similar controls. The parent owns arrangement, so tune spacing and flow behavior before trying to compensate with child Left and Top values. Check both a wide and a narrow window.
Add FlowLayoutPanel to its intended parent and name it flpMain for this example:
| Property | Example value |
|---|---|
Padding | "8" |
FlowDirection | "LeftToRight" |
WrapContents | True |
Spacing | 10 |
CrossAlignment | "Center" |
BorderStyle | "Solid" |
BorderWidth | 1 |
Use the full lesson for the owner’s initialization code and its complete layout.
Contract defaults are shown below. Where a new control has a different Designer starting value, that value is listed separately.
LeftHorizontal position in device-independent points, relative to the parent container.
Range: -100000 to 100000.
TopVertical position in device-independent points, relative to the parent container.
Range: -100000 to 100000.
WidthControl width in device-independent points.
Range: 0 to 100000.
Designer starting value: 360.
HeightControl height in device-independent points.
Range: 0 to 100000.
Designer starting value: 200.
MinWidthMinimum control width in device-independent points; 0 lets the parent layout choose.
Range: 0 to 100000.
MinHeightMinimum control height in device-independent points; 0 lets the parent layout choose.
Range: 0 to 100000.
MaxWidthMaximum control width in device-independent points.
Range: 0 to 100000.
MaxHeightMaximum control height in device-independent points.
Range: 0 to 100000.
TabIndexKeyboard navigation order within the parent container; lower values come first.
Range: 0 to 100000.
ZIndexStacking order among sibling controls; larger values appear in front. Equal values preserve document order.
Range: -100000 to 100000.
AnchorEdges kept at their authored distance when the parent resizes. Use a comma-separated combination of Left, Top, Right and Bottom; Dock overrides the effective anchor without deleting it.
DockAutomatic placement within the parent: None, Left, Top, Right, Bottom or Fill. Dock overrides effective Anchor layout without deleting the stored anchors.
VisibleWhether the control is shown in the running application.
BackColorContainer background color as #RRGGBB. Empty uses the current theme background.
BorderStyleContainer border style: Solid draws the configured border; None removes it without discarding the authored color or width.
BorderColorContainer border color as #RRGGBB. Empty uses the current theme border color.
BorderWidthContainer border width in device-independent points.
Range: 0 to 100.
CornerRadiusContainer corner radius in device-independent points.
Range: 0 to 1000.
MarginExternal spacing as one non-negative DIP value or Left,Top,Right,Bottom.
PaddingInner spacing as one non-negative DIP value or Left,Top,Right,Bottom; child coordinates remain relative to the padded content area.
Designer starting value: "8".
FlowDirectionChild ordering direction: LeftToRight, RightToLeft, TopDown or BottomUp.
WrapContentsWraps children onto another row or column when the main axis is full.
SpacingGap between adjacent children and wrapped lines in device-independent points.
Range: 0 to 100000.
CrossAlignmentAligns children across each row or column: Start, Center or End.
ClipToBoundsWhether authored child content is clipped to the container bounds.
CursorPointer shown over the control: Default, Arrow, Hand, IBeam, Cross, Wait, Help, SizeAll, SizeNS, SizeWE, SizeNWSE, SizeNESW or NotAllowed.
OpacityVisual opacity from 0 (transparent) to 1 (opaque).
Range: 0 to 1.
DesignLockedPrevents movement and resizing in the Designer without changing runtime interaction.
AccessibleDescriptionAdditional help text announced by assistive technology.
AutomationIdStable automation identifier; empty uses the component Name.
AccessibleNameName announced by assistive technology. Empty uses the stable control Name.
AccessibleRoleAccessibility role override. Auto preserves the native semantic role; explicit values use the corresponding platform automation role.
ToolTipTextHelp text shown when the pointer rests over the running control; empty disables the tooltip.
TagApplication-defined text associated with this control; McBasic™ does not interpret it.
EnabledWhether the control accepts user interaction in the running application.
HitTestVisibleWhether the running control participates in pointer hit testing. The control remains selectable in the Designer.
AllowDropWhether this running control accepts application drag-and-drop operations; Designer movement is separate.
DragModeVB control drag: 0 Manual (code starts a drag with the Drag method) or 1 Automatic (a left-button press starts a drag, and the control raises no Click, MouseDown or MouseUp for that press).
Range: 0 to 1.
DragIconCase-insensitive name of a declared project image resource shown under the pointer while this control is dragged; empty shows a grey outline of the control.
IndexPosition of this control in its control array, 0 to 32767. Several controls share one name only when every one of them has an Index. Absent from the layout, and -1 in code, when the control is not in an array.
Designer values: 0 to 32767. Clear the dedicated Index row for a non-array control; BASIC then reads -1.
Replace control with the object’s Name when creating a handler. ByRef arguments may be changed by your handler; ByVal arguments report an input value.
Occurs when runtime drag data enters this control; set Effect to Copy, Move, Link or None.
Private Sub control_DragEnter(ByVal Data As DragData, ByRef Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByRef |
X | Double | ByVal |
Y | Double | ByVal |
Occurs while runtime drag data moves over this control; Effect may be updated for the current position.
Private Sub control_DragOver(ByVal Data As DragData, ByRef Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByRef |
X | Double | ByVal |
Y | Double | ByVal |
Occurs while a control dragged inside the app (DragMode or the Drag method) moves over this control: State is 0 when it enters, 2 while it moves over and 1 when it leaves; Source is the dragged control and X, Y are local DIP coordinates.
Private Sub control_DragOver(ByVal Source As Control, ByVal X As Single, ByVal Y As Single, ByVal State As Integer)| Parameter | Type | Direction |
|---|---|---|
Source | Control | ByVal |
X | Single | ByVal |
Y | Single | ByVal |
State | Integer | ByVal |
Occurs when runtime drag data leaves this control without a drop.
Private Sub control_DragLeave()No parameters.
Occurs when runtime drag data is dropped on this control with a stable McBasic™ effect and local DIP coordinates.
Private Sub control_Drop(ByVal Data As DragData, ByVal Effect As DragEffect, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Data | DragData | ByVal |
Effect | DragEffect | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
Occurs when a control dragged inside the app (DragMode or the Drag method) is released over this control; Source is the dragged control and X, Y are local DIP coordinates.
Private Sub control_DragDrop(ByVal Source As Control, ByVal X As Single, ByVal Y As Single)| Parameter | Type | Direction |
|---|---|---|
Source | Control | ByVal |
X | Single | ByVal |
Y | Single | ByVal |
Occurs when a pointing-device button is pressed over this control; Button is stable McBasic™ identity and X/Y are control-local DIP coordinates.
Private Sub control_MouseDown(ByVal Button As MouseButton, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButton | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
Occurs when a pointing-device button is released for this control; Button is stable McBasic™ identity and X/Y are control-local DIP coordinates.
Private Sub control_MouseUp(ByVal Button As MouseButton, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButton | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
Occurs when the pointer moves over the logical McBasic™ control; Button contains the currently held buttons and X/Y are local DIP coordinates.
Private Sub control_MouseMove(ByVal Button As MouseButtons, ByVal Shift As KeyModifiers, ByVal X As Double, ByVal Y As Double)| Parameter | Type | Direction |
|---|---|---|
Button | MouseButtons | ByVal |
Shift | KeyModifiers | ByVal |
X | Double | ByVal |
Y | Double | ByVal |
Occurs once when the pointer enters the effective bounds of the logical McBasic™ control.
Private Sub control_MouseEnter()No parameters.
Occurs once when the pointer leaves the effective bounds of the logical McBasic™ control.
Private Sub control_MouseLeave()No parameters.
Occurs when native system timing recognizes a primary-button double activation on the same logical McBasic™ control.
Private Sub control_DoubleClick()No parameters.
No methods are declared in this component’s built-in metadata. Use its documented properties and events; do not infer APIs from a similarly named control in another framework.
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