Syntax Reference - QB64

In alphabetical order. GET/PUT/PRINT/INPUT reffer to TCP/IP. Keyword that syntax refers to is linked. A brief explanation in grey next to the syntax.

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BG = _BACKGROUNDCOLOR → Returns the current background color.
...AS [_UNSIGNED] _BIT [*numberofbits] → The bit can only hold -1 or 0, unsigned bit can hold 1 or 0.
_BLEND [imagehandle] → Turns on alpha blending.
enabledflag = _BLEND [(imagehandle)] → Returns -1 if alpha blending is enabled on the current image or a specific one, otherwise it returns 0.
blue = _BLUE(palette_index/32_bit_color[, image_handle])
blue_intensity% = _BLUE32(color32value)
...AS [_UNSIGNED] _BYTE → A byte can hold 256 values from -128 to 127, unsigned byte can hold 0 to 255.

_CLEARCOLOR RGBsettings[, ImageHandle] → Defines the transparent color for all images or a specific one.
colorvalue = _CLEARCOLOR [(handle)] → Returns the current transparent color.
result$ = _CLIPBOARD$→ Retrieve the contents of the clipboard.
_CLIPBOARD$ = string_expression$→ Set the contents of the clipboard.
status = _CONNECTED(handle)
address$ = _CONNECTIONADDRESS(handle)
copyhandle& = _COPYIMAGE& [(handle)] → Returns a handle to a copy of a image.
_COPYPALETTE [sourceImageHandle&[, destinationImageHandle&]]
result = _CV(numericalType, stringValue$)

result& = _DEFAULTCOLOR [(imageHandle&)]
_DEFINE range or letter[, range2 or letter2[, range3 or letter3[, ...]]] AS [_UNSIGNED] datatype → Defines variables starting with a letter or range of letters (like A-Z) as a datatype.
_DELAY seconds! → Delays the program the specified number of seconds.
_DEST handle → Sets the drawing destination image.
handle = _DEST → Returns the current drawing destination image handle.
_DISPLAY → Turns off automatic display, while displaying the buffer to the screen.
displayedimage = _DISPLAY → Returns the current displayed image.
_DONTBLEND [imagehandle] → Turns off alpha blending.

erline = _ERRORLINE → In case of error returns the line that produced the error.
quit% = _EXIT

...AS [_UNSIGNED] _FLOAT
_FONT Font_handle[, Image_handle&] → Set the font for the current image or a specified one.
font_handle = _FONT [(image_handle)] → Returns the font handle for the current image or a specified one.
character_height_in_pixels = _FONTHEIGHT [(font_handle)] → Returns the height of a font defined by font_handle.
character_width_in_pixels = _FONTWIDTH [(font_handle)] → Returns the width of a font defined by font_handle.
_FREEFONT font_handle → Closes the font defined by font_handle.
_FREEIMAGE [handle] → Closes the image defined by handle.
timerhandle = _FREETIMER
full = FULLSCREEN
_FULLSCREEN [{_OFF|_STRETCH|_SQUAREPIXELS}]

GET #handle, ,b$ → In QB64 gets a raw (unformatted) string from a open TCP/IP connection handle.
- GET #handle, ,x% → In QB64 gets a raw (unformatted) integer from a open TCP/IP connection handle.
green = _GREEN(palette_index/32_bit_color[, image_handle])
green_intensity% = _GREEN32(color32value)

_ICON handle → Sets the program icon to the image defined by handle.
INPUT #handle, data1[, data2, ...etc] → In QB64 retrieves data using the QB64 format from a open TCP/IP connection handle.
...AS [_UNSIGNED] _INTEGER64

_LIMIT (FramesPerSecond%) → Limits the framerate of a loop.
font_handle = _LOADFONT(ttf_filename$, height [,"BOLD,ITALIC,UNDERLINE,DONTBLEND,MONOSPACE"]) → Loads a font and returns the handle to it.
handle& = _LOADIMAGE& (filename$[, mode]) → Loads a image and returns the handle to it.

stringvalue$ = _MK$(numericaltype, numbervalue)
buttontriggered = _MOUSEBUTTON (Button%) → Returns -1 if the mouse button is triggered.
_MOUSEHIDE → Hides the mouse.
newmouseinput = _MOUSEINPUT → Returns -1 if there are new input from the mouse.
xmovement = _MOUSEMOVEMENTX → Returns the number of pixels in the x direction that the mouse has moved since the latest call. Also hides the mouse (you cannot exit by clicking the X button so make sure you have an alternative exit).
ymovement = _MOUSEMOVEMENTY → Returns the number of pixels in the y direction that the mouse has moved since the latest call. Also hides the mouse (you cannot exit by clicking the X button so make sure you have an alternative exit).
_MOUSESHOW → Shows the mouse.
scroll% = _MOUSEWHEEL
xposmouse = _MOUSEX → Returns the x position of the mouse.
yposmouse = _MOUSEY → Returns the y position of the mouse.

handle& = _NEWIMAGE& (width, height[, BPPmode]) → Creates and gives the handle to a new image.

color32value& = _PALETTECOLOR(attribute_number&, handle&)
BytesPerPixel& = _PIXELSIZE (imagehandle&) → Returns the number of bytes a pixel takes up in a certain image.
REDIM _PRESERVE Array(newelements%)→ Optional argument to REDIM used to preserve the contents of an array while re-dimensioning.
PRINT #handle, data [, data2, ...etc] → In QB64 sends data using the QB64 format to a open TCP/IP connection handle.
_PRINTMODE mode[, image_handle]
status% = _PRINTMODE [(image_handle)]
_PRINTSTRING (column, row), text_to_print$[, image_handle&] → Prints text to the screen.
pixel_width = _PRINTWIDTH(text_to_print$[, image_handle&])
PUT #handle, , data → In QB64; Transmits raw data to a open TCP/IP connection handle.
_PUTIMAGE [(destx, desty)][-(destx2, desty2)], [srchandle], [desthandle][,(srcx, srcy)][-(srcx2, srcy2)] → Puts a image from a area of a source image to a area of a destination image.

red = _RED(palette_index/32_bit_color[, image_handle])
red_intensity% = _RED32(color32value)
colorindex = _RGB(red, green, blue[, image_handle]) → Returns the color index for a mix of Red, Green and Blue components.
color32 = _RGB32(red, green, blue) → Returns the 32-bit color value for a mix of Red, Green and Blue components.
colorindex = _RGBA(red, green, blue, alpha[, image_handle]) → Returns the color index for a mix of Red, Green, Blue and alpha components.
color32 = _RGBA32(red, green, blue, alpha) → Returns the 32-bit color value for a mix of Red, Green, Blue and alpha components.
roundedvalue = _ROUND(value)

t = TIMER(accuracy) → Returns the current timer value with a chosen accuracy (can be down to .001, which is millisecond accuracy).
_TITLE Text$ → Sets the title of the program window.
...AS [_UNSIGNED] datatype → _UNSIGNED makes the datatype always positive, increases the maximum value of the datatype.