Resize form when form has no border in VB

• This topic explains about, how to resize form when form has no borders to drag in VB programming.

Resize form when form has no border in VB – Working

• When you press the left mouse button down on the form, the MouseDown event handler executes.
• It sets the control’s Capture property to False to release the mouse capture that was started by pressing the mouse button down.

Control.MouseDown Event – Resize form when form has no border in VB

• Control.MouseDown Event occurs when the mouse pointer is over the control and a mouse button is pressed.

Namespace:  System.Windows.Forms

Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

WM_NCLBUTTONDOWN message (Windows) – Resize form when form has no border in VB

• Message posted when the user presses the left mouse button while the cursor is within the non client area of a window.
• This message is posted to the window that contains the cursor.
• If a window has captured the mouse, this message is not posted.
• If an application processes this message, it will return zero.

Parameters

• wParam

• The hit-test value returned by the DefWindowProc function as a result of processing the WM_NCHITTEST message. For a list of hit-test values, see WM_NCHITTEST.

• lParam

• A POINTS structure that contains the x- and y-coordinates of the cursor. The coordinates are relative to the upper-left corner of the screen.

• More refer: Microsoft

Resize form when form has no border in VB – Complete Code

• Write below code inside Mouse Down event of a form.

Resize form when form has no border in VB

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