I'm on Windows 7, and i am trying to display an icon with transparency on my contextual menu but it doesn't work.
I am trying to use LoadImage like this :
m_hMenuBmp = (HBITMAP)::LoadImage(g_hInst, L"C:\\Users\\nicolas\\AppData\\Roaming\\MyApp\\icon.bmp", IMAGE_BITMAP, 16, 16, LR_LOADFROMFILE | LR_LOADTRANSPARENT );
and my icon.bmp is set to 256 colors with white ( 255, 255, 255 ) on background ... I don't know why this isn't working ...
I tried the ARGB Method of Raymon Chen but it didn't work neither !
int cx = GetSystemMetrics(SM_CXSMICON);
int cy = GetSystemMetrics(SM_CYSMICON);
BITMAPINFO bmi = {0};
bmi.bmiHeader.biSize =sizeof(bmi.bmiHeader);
bmi.bmiHeader.biWidth = cx;
bmi.bmiHeader.biHeight = cy;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
DWORD *pBits;
m_hMenuBmp = CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, (void **)&pBits, NULL , 0);
if (m_hMenuBmp)
{
for (int y = 0; y < cy ; y++ )
{
for (int x = 0; x < cx; x++)
{
BYTE bAlpha = x * x * 255 / cx / cx;
DWORD dv = (bAlpha << 24) | (bAlpha << 16) | bAlpha ;
pBits[y *cx + x] - dv;
}
}
}
And I don't know why ... my icon isn't displayed with this method ..
I found a way to did this easily :