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GradientFillRect The GradientFill function fills rectangle and triangle structures.
VB4-32,5,6
Declare Function GradientFillRect Lib "msimg32" Alias "GradientFill" (ByVal hdc As Long, pVertex As TRIVERTEX, ByVal dwNumVertex As Long, pMesh As GRADIENT_RECT, ByVal dwNumMesh As Long, ByVal dwMode As Long) As Long |
VB.NET
System.Drawing.Drawing2D.LinearGradientBrush |
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Operating Systems Supported |
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Requires Windows 2000 or later; Requires Windows 98 or later |
- hdc
[in] Handle to the destination device context.
- pVertex
[in] Pointer to an array of TRIVERTEX structures that each define a triangle vertex.
- dwNumVertex
[in] The number of vertices in pVertex.
- pMesh
[in] Array of GRADIENT_TRIANGLE structures in triangle mode, or an array of GRADIENT_RECT structures in rectangle mode.
- dwNumMesh
[in] The number of elements (triangles or rectangles) in pMesh.
- dwMode
[in] Specifies gradient fill mode. This parameter can be one of the following values.
GRADIENT_FILL_RECT_H
In this mode, two endpoints describe a rectangle. The rectangle is defined to have a constant color (specified by the TRIVERTEX structure) for the left and right edges. GDI interpolates the color from the top to bottom edge and fills the interior.
GRADIENT_FILL_RECT_V
In this mode, two endpoints describe a rectangle. The rectangle is defined to have a constant color (specified by the TRIVERTEX structure) for the top and bottom edges. GDI interpolates the color from the top to bottom edge and fills the interior.
GRADIENT_FILL_TRIANGLE
In this mode, an array of TRIVERTEX structures is passed to GDI along with a list of array indexes that describe separate triangles. GDI performs linear interpolation between triangle vertices and fills the interior. Drawing is done directly in 24- and 32-bpp modes. Dithering is performed in 16-, 8-, 4-, and 1-bpp mode. |
If the function succeeds, the return value is TRUE.
If the function fails, the return value is FALSE.
Windows NT/ 2000: To get extended error information, call GetLastError. |
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