Adds two new methods of the audio_form class for querying the minimum…

… and maximum values of a given slider.

doc/src/references/include/Auditory User Interface (form.nvgt)/Classes/audio_form/Methods/get_slider_maximum_value.md

@@ -0,0 +1,13 @@
+# get_slider_maximum_value
+Get the maximum value of a slider.
+
+`double audio_form::get_slider_maximum_value(int control_index);`
+
+## Arguments:
+* int control_index: the index of the slider to query.
+
+## Returns:
+double: the maximum allowable value the slider may be set to. In case of error, this may return -1. To get error information, see `audio_form::get_last_error();`.
+
+## Remarks:
+This method only works on slider control.

doc/src/references/include/Auditory User Interface (form.nvgt)/Classes/audio_form/Methods/get_slider_minimum_value.md

@@ -0,0 +1,13 @@
+# get_slider_minimum_value
+Get the minimum value of a slider.
+
+`double audio_form::get_slider_minimum_value(int control_index);`
+
+## Arguments:
+* int control_index: the index of the slider to query.
+
+## Returns:
+double: the minimum allowable value the slider may be set to. In case of error, this may return -1. To get error information, see `audio_form::get_last_error();`.
+
+## Remarks:
+This method only works on slider control.

release/include/form.nvgt

@@ -1944,6 +1944,38 @@ class audio_form {
 		}
 		return c_form[control_index].slider_value;
 	}
+	double get_slider_minimum_value(int control_index) {
+		form_error = 0;
+		if (!active) {
+			form_error = form_error_no_window;
+			return -1;
+		}
+		if ((control_index < 0) || (control_index > c_form.length() - 1)) {
+			form_error = form_error_invalid_index;
+			return -1;
+		}
+		if (c_form[control_index].type != ct_slider) {
+			form_error = form_error_invalid_control;
+			return -1;
+		}
+		return c_form[control_index].slider_minimum_value;
+}
+double get_slider_maximum_value(int control_index) {
+		form_error = 0;
+		if (!active) {
+			form_error = form_error_no_window;
+			return -1;
+		}
+		if ((control_index < 0) || (control_index > c_form.length() - 1)) {
+			form_error = form_error_invalid_index;
+			return -1;
+		}
+		if (c_form[control_index].type != ct_slider) {
+			form_error = form_error_invalid_control;
+			return -1;
+		}
+		return c_form[control_index].slider_maximum_value;
+}
 	string get_slider_text_value(int control_index, double value) {
 		form_error = 0;
 		if (!active) {