Function name: GradientFillRect

Defined in : msimg32

Requirements : Windows 2000 or later; Windows 98 or later

Declaration:

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

Parameters:

* 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.

Returns:

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.

Related functions:

Examples:

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