###### (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development version.) # SDL_GetWindowSize Get the size of a window's client area. ## Syntax ```c void SDL_GetWindowSize(SDL_Window * window, int *w, int *h); ``` ## Function Parameters | | | | -------------- | ------------------------------------------------------------------------------------- | | **window** | the window to query the width and height from | | **w** | a pointer filled in with the width of the window, in screen coordinates, may be NULL | | **h** | a pointer filled in with the height of the window, in screen coordinates, may be NULL | ## Remarks NULL can safely be passed as the `w` or `h` parameter if the width or height value is not desired. The window size in screen coordinates may differ from the size in pixels, if the window was created with [`SDL_WINDOW_ALLOW_HIGHDPI`](SDL_WINDOW_ALLOW_HIGHDPI) on a platform with high-dpi support (e.g. iOS or macOS). Use [SDL_GL_GetDrawableSize](SDL_GL_GetDrawableSize)(), [SDL_Vulkan_GetDrawableSize](SDL_Vulkan_GetDrawableSize)(), or [SDL_GetRendererOutputSize](SDL_GetRendererOutputSize)() to get the real client area size in pixels. ## Version This function is available since SDL 2.0.0. ## Related Functions * [SDL_GL_GetDrawableSize](SDL_GL_GetDrawableSize) * [SDL_Vulkan_GetDrawableSize](SDL_Vulkan_GetDrawableSize) * [SDL_SetWindowSize](SDL_SetWindowSize) ---- [CategoryAPI](CategoryAPI)