How to remove thin black border while printing bitmap in Win32 app

Question

Hello,

I'm working on C++/WinRT application, and trying to print bitmap using printer. But I'm getting thin black border on the printed page. I'm doing similar to below code snippet.

// Printer HDC

HDC     hdc_printer = CreateDCW (NULL, L"My Printer Name", NULL, NULL);

// Getting height and width from the printer

int     width       = GetDeviceCaps (hdc_printer, HORZRES);
int     height      = GetDeviceCaps (hdc_printer, VERTRES);

// Creating bitmap

HBITMAP bitmap      = CreateBitmap (width, height, 1, 32, NULL);

// Draw bitmap

// SelectObject (hdc_bitmap, bitmap)
// StartDoc (...)
// StartPage (...)

// Print bitmap using printer

BitBlt (hdc_printer, 0, 0, width, height, hdc_bitmap, 0, 0, SRCCOPY);

// EndPage (...)
// EndDoc (...)

Please help me to understand the reason behind this and how to remove this border.

Thanks.

Answer 1

According to lpBits of CreateBitmap, you may need to initialize the color data. And you should try CreateCompatibleBitmap.