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Interestingly, the Container property is writable under VB6, a feature that allows developers to move controls from one container to another container (on the same form) at runtime, as in this code: ' move the txtName control into the picFrame container (a PictureBox container) IntegerColorValue = ColorTranslator.ToOle(txtName.BackColor)įor uniformity and readability’s sake, VB Migration Partner generates calls to FromOleColor6 and ToOleColor6 methods, which in turn invoke the methods of the ColorTranslator type.Īll visible VB6 controls expose the Container property, which returns a reference to the form or control that contains the current control. You can perform such conversions by means of the ToOle, FromOle, and FromWin32 methods of the type: txtName.BackColor = ColorTranslator.FromOle(integerColorValue) This explicit conversion is necessary, for example, if your application reads color values from a data file or a database, or if you dynamically calculate a color value by means of a method (e.g. In some cases, however, you might have to convert a 32-bit integer to a color value, or vice versa.
#Convert vb6 to vb net 2010 code
In most circumstances both the source and the destination of a color assignment become Color values after the migration to VB.NET, therefore you don’t need any specific fix to have the code compile correctly. NET Framework languages represent color values by means of instances of the type. VB6 assigns and manipulates color values and properties – such as ForeColor and BackColor - by means of 32-bit integers VB.NET and all.
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VB.NET doesn’t expose such a property.Ĭontrols in VB Migration Partner’s support library expose this property, but it always returns False attempts to assign a different value are ignored (or throw an exception if the VB6Config.ThrowOnUnsupportedMembers property is True). The VB6 Form, UserControl, and PictureBox objects expose the ClipControls property, which allows to developers to speed up the user interface in some circumstances. Strings equal to Nothing are converted to empty strings before being assigned to the Text property, thus avoiding unexpected runtime exceptions. VB Migration Partner support the Caption property, to ensure that converted code works as intended even if the control is accessed via late binding. Notice that assigning the Text property a string equal to Nothing causes a runtime exception. No VB.NET control exposes the Caption property, which has been converted to the Text property. This behavior is common to other VB.NET controls, such as Button. When you drop a VB6 Label control on a form, the initial value of its BackColor property is set to ButtonFace when you drop a VB.NET Label control on a form, the initial value of its BackColor property is equal to the background color of the container control. (As in VB6, no Paint event is raised when AutoRedraw is True.) VB Migration Partner supports and replicates the exact behavior of the AutoRedraw property, thus you can easily convert VB6 applications that use double-buffering techniques and persistent graphic output.
#Convert vb6 to vb net 2010 manual
VB.NET doesn’t support the AutoRedraw property, therefore implementing double-buffered graphics requires manual code edits. VB.NET doesn’t support this property, because the control’s appearance is dictated by the operating system.Ĭontrols in VB Migration Partner’s support library expose the Appearance property, which always returns the value 1-3D any attempt to assign a different value is ignored (or throws an exception if VB6Config.ThrowOnUnsupportedMembers property is set to True). Many VB6 controls support the Appearance property, which enables to select between flat and 3D appearance. Under VB.NET this property is replaced by the Dock property, which is exposed by all the controls in the namespace. A few VB6 controls – including the PictureBox and Data control – expose the Align property, which permit to automatically dock the control to one of the sides of the form border.