Function name: GetDIBits

Defined in : gdi32

Requirements : Windows NT 3.1 or later; Windows 95 or later

Declaration:

Declare Function GetDIBits Lib "gdi32" (ByVal aHDC As Long, ByVal hBitmap As Long, ByVal nStartScan As Long, ByVal nNumScans As Long, lpBits As Any, lpBI As BITMAPINFO, ByVal wUsage As Long) As Long

Parameters:

* hdc Identifies the device context. * hbmp Identifies the bitmap. * uStartScan Specifies the first scan line to retrieve. * cScanLines Specifies the number of scan lines to retrieve. * lpvBits Points to a buffer to receive the bitmap data. If this parameter is NULL, the function passes the dimensions and format of the bitmap to the BITMAPINFO structure pointed to by the lpbi parameter. * lpbi Points to a BITMAPINFO structure that specifies the desired format for the device-independent bitmap (DIB) data. * uUsage Specifies the format of the bmiColors member of the BITMAPINFO structure. It must be one of the following values: DIB_PAL_COLORS The color table should consist of an array of 16-bit indices into the current logical palette. DIB_RGB_COLORS The color table should consist of literal red, green, blue (RGB) values.

Returns:

If the lpvBits parameter is non-NULL and the function succeeds, the return value is the number of scan lines copied from the bitmap. Windows 95: If the lpvBits parameter is NULL and GetDIBits successfully fills the BITMAPINFO structure, the return value is the total number of scan lines in the bitmap. Windows NT: If the lpvBits parameter is NULL and GetDIBits successfully fills the BITMAPINFO structure, the return value is non-zero. If the function fails, the return value is zero.

Related functions:

Examples:

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