Det skal du gøre med et billedbehandlings program, f.eks. photoshop og så exportere det som gif, for at have en trasparant baggrund skal det være i billedet....
TransparentImage The TransparentImage function transfers a bitmap, omitting the portions drawn in a specified color.
Syntax BOOL TransparentImage(HDC hdcDest, LONG DstX, LONG DstY, LONG DstCx, LONG DstCy, HANDLE hSrc, LONG SrcX, LONG SrcY, LONG SrcCx, LONG SrcCy, COLORREF TransparentColor );
At a Glance Header file: Wingdi.h Component: mgblt2 Platforms: H/PC Windows CE versions: 2.0 and later
Parameters hdcDest Handle to a device context. DstX Specifies the x-coordinate, in logical units, of the upper-left corner of the destination rectangle. DstY Specifies the y-coordinate, in logical units, of the upper-left corner of the destination rectangle. DstCx Specifies the width, in logical units, of the destination rectangle. DistCy Specifies the height, in logical units, of the destination rectangle. hSrc Specifies a source device context or a source bitmap. SrcX Specifies the x-coordinate, in logical units, of the upper-left corner of the source rectangle. SrcY Specifies the y-coordinate, in logical units, of the upper-left corner of the source rectangle. SrcCx Specifies the width, in logical units, of the source rectangle. SrcCy Specifies the height, in logical units, of the source rectangle. TransparentColor Indicates the color in the bitmap that will be rendered transparent. Return Values If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. To get extended error information, call GetLastError.
Remarks If the hSrc parameter is a HBITMAP, then that bitmap must not be selected into a device context at the time TransparentImage is called.
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